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<div class="section" id="email-examples">
<span id="id1"></span><h1><a class="reference internal" href="email.html#module-email" title="email: Package supporting the parsing, manipulating, and generating email messages."><code class="xref py py-mod docutils literal notranslate"><span class="pre">email</span></code></a>: Examples<a class="headerlink" href="#email-examples" title="Permalink to this headline"></a></h1>
<p>Here are a few examples of how to use the <a class="reference internal" href="email.html#module-email" title="email: Package supporting the parsing, manipulating, and generating email messages."><code class="xref py py-mod docutils literal notranslate"><span class="pre">email</span></code></a> package to read, write,
and send simple email messages, as well as more complex MIME messages.</p>
<p>First, let’s see how to create and send a simple text message (both the
text content and the addresses may contain unicode characters):</p>
<div class="highlight-python3 notranslate"><div class="highlight"><pre><span></span><span class="c1"># Import smtplib for the actual sending function</span>
<span class="kn">import</span> <span class="nn">smtplib</span>
<span class="c1"># Import the email modules we&#39;ll need</span>
<span class="kn">from</span> <span class="nn">email.message</span> <span class="k">import</span> <span class="n">EmailMessage</span>
<span class="c1"># Open the plain text file whose name is in textfile for reading.</span>
<span class="k">with</span> <span class="nb">open</span><span class="p">(</span><span class="n">textfile</span><span class="p">)</span> <span class="k">as</span> <span class="n">fp</span><span class="p">:</span>
<span class="c1"># Create a text/plain message</span>
<span class="n">msg</span> <span class="o">=</span> <span class="n">EmailMessage</span><span class="p">()</span>
<span class="n">msg</span><span class="o">.</span><span class="n">set_content</span><span class="p">(</span><span class="n">fp</span><span class="o">.</span><span class="n">read</span><span class="p">())</span>
<span class="c1"># me == the sender&#39;s email address</span>
<span class="c1"># you == the recipient&#39;s email address</span>
<span class="n">msg</span><span class="p">[</span><span class="s1">&#39;Subject&#39;</span><span class="p">]</span> <span class="o">=</span> <span class="s1">&#39;The contents of </span><span class="si">%s</span><span class="s1">&#39;</span> <span class="o">%</span> <span class="n">textfile</span>
<span class="n">msg</span><span class="p">[</span><span class="s1">&#39;From&#39;</span><span class="p">]</span> <span class="o">=</span> <span class="n">me</span>
<span class="n">msg</span><span class="p">[</span><span class="s1">&#39;To&#39;</span><span class="p">]</span> <span class="o">=</span> <span class="n">you</span>
<span class="c1"># Send the message via our own SMTP server.</span>
<span class="n">s</span> <span class="o">=</span> <span class="n">smtplib</span><span class="o">.</span><span class="n">SMTP</span><span class="p">(</span><span class="s1">&#39;localhost&#39;</span><span class="p">)</span>
<span class="n">s</span><span class="o">.</span><span class="n">send_message</span><span class="p">(</span><span class="n">msg</span><span class="p">)</span>
<span class="n">s</span><span class="o">.</span><span class="n">quit</span><span class="p">()</span>
</pre></div>
</div>
<p>Parsing <span class="target" id="index-0"></span><a class="rfc reference external" href="https://tools.ietf.org/html/rfc822.html"><strong>RFC 822</strong></a> headers can easily be done by the using the classes
from the <a class="reference internal" href="email.parser.html#module-email.parser" title="email.parser: Parse flat text email messages to produce a message object structure."><code class="xref py py-mod docutils literal notranslate"><span class="pre">parser</span></code></a> module:</p>
<div class="highlight-python3 notranslate"><div class="highlight"><pre><span></span><span class="c1"># Import the email modules we&#39;ll need</span>
<span class="kn">from</span> <span class="nn">email.parser</span> <span class="k">import</span> <span class="n">BytesParser</span><span class="p">,</span> <span class="n">Parser</span>
<span class="kn">from</span> <span class="nn">email.policy</span> <span class="k">import</span> <span class="n">default</span>
<span class="c1"># If the e-mail headers are in a file, uncomment these two lines:</span>
<span class="c1"># with open(messagefile, &#39;rb&#39;) as fp:</span>
<span class="c1"># headers = BytesParser(policy=default).parse(fp)</span>
<span class="c1"># Or for parsing headers in a string (this is an uncommon operation), use:</span>
<span class="n">headers</span> <span class="o">=</span> <span class="n">Parser</span><span class="p">(</span><span class="n">policy</span><span class="o">=</span><span class="n">default</span><span class="p">)</span><span class="o">.</span><span class="n">parsestr</span><span class="p">(</span>
<span class="s1">&#39;From: Foo Bar &lt;user@example.com&gt;</span><span class="se">\n</span><span class="s1">&#39;</span>
<span class="s1">&#39;To: &lt;someone_else@example.com&gt;</span><span class="se">\n</span><span class="s1">&#39;</span>
<span class="s1">&#39;Subject: Test message</span><span class="se">\n</span><span class="s1">&#39;</span>
<span class="s1">&#39;</span><span class="se">\n</span><span class="s1">&#39;</span>
<span class="s1">&#39;Body would go here</span><span class="se">\n</span><span class="s1">&#39;</span><span class="p">)</span>
<span class="c1"># Now the header items can be accessed as a dictionary:</span>
<span class="nb">print</span><span class="p">(</span><span class="s1">&#39;To: </span><span class="si">{}</span><span class="s1">&#39;</span><span class="o">.</span><span class="n">format</span><span class="p">(</span><span class="n">headers</span><span class="p">[</span><span class="s1">&#39;to&#39;</span><span class="p">]))</span>
<span class="nb">print</span><span class="p">(</span><span class="s1">&#39;From: </span><span class="si">{}</span><span class="s1">&#39;</span><span class="o">.</span><span class="n">format</span><span class="p">(</span><span class="n">headers</span><span class="p">[</span><span class="s1">&#39;from&#39;</span><span class="p">]))</span>
<span class="nb">print</span><span class="p">(</span><span class="s1">&#39;Subject: </span><span class="si">{}</span><span class="s1">&#39;</span><span class="o">.</span><span class="n">format</span><span class="p">(</span><span class="n">headers</span><span class="p">[</span><span class="s1">&#39;subject&#39;</span><span class="p">]))</span>
<span class="c1"># You can also access the parts of the addresses:</span>
<span class="nb">print</span><span class="p">(</span><span class="s1">&#39;Recipient username: </span><span class="si">{}</span><span class="s1">&#39;</span><span class="o">.</span><span class="n">format</span><span class="p">(</span><span class="n">headers</span><span class="p">[</span><span class="s1">&#39;to&#39;</span><span class="p">]</span><span class="o">.</span><span class="n">addresses</span><span class="p">[</span><span class="mi">0</span><span class="p">]</span><span class="o">.</span><span class="n">username</span><span class="p">))</span>
<span class="nb">print</span><span class="p">(</span><span class="s1">&#39;Sender name: </span><span class="si">{}</span><span class="s1">&#39;</span><span class="o">.</span><span class="n">format</span><span class="p">(</span><span class="n">headers</span><span class="p">[</span><span class="s1">&#39;from&#39;</span><span class="p">]</span><span class="o">.</span><span class="n">addresses</span><span class="p">[</span><span class="mi">0</span><span class="p">]</span><span class="o">.</span><span class="n">display_name</span><span class="p">))</span>
</pre></div>
</div>
<p>Here’s an example of how to send a MIME message containing a bunch of family
pictures that may be residing in a directory:</p>
<div class="highlight-python3 notranslate"><div class="highlight"><pre><span></span><span class="c1"># Import smtplib for the actual sending function</span>
<span class="kn">import</span> <span class="nn">smtplib</span>
<span class="c1"># And imghdr to find the types of our images</span>
<span class="kn">import</span> <span class="nn">imghdr</span>
<span class="c1"># Here are the email package modules we&#39;ll need</span>
<span class="kn">from</span> <span class="nn">email.message</span> <span class="k">import</span> <span class="n">EmailMessage</span>
<span class="c1"># Create the container email message.</span>
<span class="n">msg</span> <span class="o">=</span> <span class="n">EmailMessage</span><span class="p">()</span>
<span class="n">msg</span><span class="p">[</span><span class="s1">&#39;Subject&#39;</span><span class="p">]</span> <span class="o">=</span> <span class="s1">&#39;Our family reunion&#39;</span>
<span class="c1"># me == the sender&#39;s email address</span>
<span class="c1"># family = the list of all recipients&#39; email addresses</span>
<span class="n">msg</span><span class="p">[</span><span class="s1">&#39;From&#39;</span><span class="p">]</span> <span class="o">=</span> <span class="n">me</span>
<span class="n">msg</span><span class="p">[</span><span class="s1">&#39;To&#39;</span><span class="p">]</span> <span class="o">=</span> <span class="s1">&#39;, &#39;</span><span class="o">.</span><span class="n">join</span><span class="p">(</span><span class="n">family</span><span class="p">)</span>
<span class="n">msg</span><span class="o">.</span><span class="n">preamble</span> <span class="o">=</span> <span class="s1">&#39;Our family reunion&#39;</span>
<span class="c1"># Open the files in binary mode. Use imghdr to figure out the</span>
<span class="c1"># MIME subtype for each specific image.</span>
<span class="k">for</span> <span class="n">file</span> <span class="ow">in</span> <span class="n">pngfiles</span><span class="p">:</span>
<span class="k">with</span> <span class="nb">open</span><span class="p">(</span><span class="n">file</span><span class="p">,</span> <span class="s1">&#39;rb&#39;</span><span class="p">)</span> <span class="k">as</span> <span class="n">fp</span><span class="p">:</span>
<span class="n">img_data</span> <span class="o">=</span> <span class="n">fp</span><span class="o">.</span><span class="n">read</span><span class="p">()</span>
<span class="n">msg</span><span class="o">.</span><span class="n">add_attachment</span><span class="p">(</span><span class="n">img_data</span><span class="p">,</span> <span class="n">maintype</span><span class="o">=</span><span class="s1">&#39;image&#39;</span><span class="p">,</span>
<span class="n">subtype</span><span class="o">=</span><span class="n">imghdr</span><span class="o">.</span><span class="n">what</span><span class="p">(</span><span class="kc">None</span><span class="p">,</span> <span class="n">img_data</span><span class="p">))</span>
<span class="c1"># Send the email via our own SMTP server.</span>
<span class="k">with</span> <span class="n">smtplib</span><span class="o">.</span><span class="n">SMTP</span><span class="p">(</span><span class="s1">&#39;localhost&#39;</span><span class="p">)</span> <span class="k">as</span> <span class="n">s</span><span class="p">:</span>
<span class="n">s</span><span class="o">.</span><span class="n">send_message</span><span class="p">(</span><span class="n">msg</span><span class="p">)</span>
</pre></div>
</div>
<p>Here’s an example of how to send the entire contents of a directory as an email
message: <a class="footnote-reference brackets" href="#id3" id="id2">1</a></p>
<div class="highlight-python3 notranslate"><div class="highlight"><pre><span></span><span class="ch">#!/usr/bin/env python3</span>
<span class="sd">&quot;&quot;&quot;Send the contents of a directory as a MIME message.&quot;&quot;&quot;</span>
<span class="kn">import</span> <span class="nn">os</span>
<span class="kn">import</span> <span class="nn">smtplib</span>
<span class="c1"># For guessing MIME type based on file name extension</span>
<span class="kn">import</span> <span class="nn">mimetypes</span>
<span class="kn">from</span> <span class="nn">argparse</span> <span class="k">import</span> <span class="n">ArgumentParser</span>
<span class="kn">from</span> <span class="nn">email.message</span> <span class="k">import</span> <span class="n">EmailMessage</span>
<span class="kn">from</span> <span class="nn">email.policy</span> <span class="k">import</span> <span class="n">SMTP</span>
<span class="k">def</span> <span class="nf">main</span><span class="p">():</span>
<span class="n">parser</span> <span class="o">=</span> <span class="n">ArgumentParser</span><span class="p">(</span><span class="n">description</span><span class="o">=</span><span class="s2">&quot;&quot;&quot;</span><span class="se">\</span>
<span class="s2">Send the contents of a directory as a MIME message.</span>
<span class="s2">Unless the -o option is given, the email is sent by forwarding to your local</span>
<span class="s2">SMTP server, which then does the normal delivery process. Your local machine</span>
<span class="s2">must be running an SMTP server.</span>
<span class="s2">&quot;&quot;&quot;</span><span class="p">)</span>
<span class="n">parser</span><span class="o">.</span><span class="n">add_argument</span><span class="p">(</span><span class="s1">&#39;-d&#39;</span><span class="p">,</span> <span class="s1">&#39;--directory&#39;</span><span class="p">,</span>
<span class="n">help</span><span class="o">=</span><span class="s2">&quot;&quot;&quot;Mail the contents of the specified directory,</span>
<span class="s2"> otherwise use the current directory. Only the regular</span>
<span class="s2"> files in the directory are sent, and we don&#39;t recurse to</span>
<span class="s2"> subdirectories.&quot;&quot;&quot;</span><span class="p">)</span>
<span class="n">parser</span><span class="o">.</span><span class="n">add_argument</span><span class="p">(</span><span class="s1">&#39;-o&#39;</span><span class="p">,</span> <span class="s1">&#39;--output&#39;</span><span class="p">,</span>
<span class="n">metavar</span><span class="o">=</span><span class="s1">&#39;FILE&#39;</span><span class="p">,</span>
<span class="n">help</span><span class="o">=</span><span class="s2">&quot;&quot;&quot;Print the composed message to FILE instead of</span>
<span class="s2"> sending the message to the SMTP server.&quot;&quot;&quot;</span><span class="p">)</span>
<span class="n">parser</span><span class="o">.</span><span class="n">add_argument</span><span class="p">(</span><span class="s1">&#39;-s&#39;</span><span class="p">,</span> <span class="s1">&#39;--sender&#39;</span><span class="p">,</span> <span class="n">required</span><span class="o">=</span><span class="kc">True</span><span class="p">,</span>
<span class="n">help</span><span class="o">=</span><span class="s1">&#39;The value of the From: header (required)&#39;</span><span class="p">)</span>
<span class="n">parser</span><span class="o">.</span><span class="n">add_argument</span><span class="p">(</span><span class="s1">&#39;-r&#39;</span><span class="p">,</span> <span class="s1">&#39;--recipient&#39;</span><span class="p">,</span> <span class="n">required</span><span class="o">=</span><span class="kc">True</span><span class="p">,</span>
<span class="n">action</span><span class="o">=</span><span class="s1">&#39;append&#39;</span><span class="p">,</span> <span class="n">metavar</span><span class="o">=</span><span class="s1">&#39;RECIPIENT&#39;</span><span class="p">,</span>
<span class="n">default</span><span class="o">=</span><span class="p">[],</span> <span class="n">dest</span><span class="o">=</span><span class="s1">&#39;recipients&#39;</span><span class="p">,</span>
<span class="n">help</span><span class="o">=</span><span class="s1">&#39;A To: header value (at least one required)&#39;</span><span class="p">)</span>
<span class="n">args</span> <span class="o">=</span> <span class="n">parser</span><span class="o">.</span><span class="n">parse_args</span><span class="p">()</span>
<span class="n">directory</span> <span class="o">=</span> <span class="n">args</span><span class="o">.</span><span class="n">directory</span>
<span class="k">if</span> <span class="ow">not</span> <span class="n">directory</span><span class="p">:</span>
<span class="n">directory</span> <span class="o">=</span> <span class="s1">&#39;.&#39;</span>
<span class="c1"># Create the message</span>
<span class="n">msg</span> <span class="o">=</span> <span class="n">EmailMessage</span><span class="p">()</span>
<span class="n">msg</span><span class="p">[</span><span class="s1">&#39;Subject&#39;</span><span class="p">]</span> <span class="o">=</span> <span class="s1">&#39;Contents of directory </span><span class="si">%s</span><span class="s1">&#39;</span> <span class="o">%</span> <span class="n">os</span><span class="o">.</span><span class="n">path</span><span class="o">.</span><span class="n">abspath</span><span class="p">(</span><span class="n">directory</span><span class="p">)</span>
<span class="n">msg</span><span class="p">[</span><span class="s1">&#39;To&#39;</span><span class="p">]</span> <span class="o">=</span> <span class="s1">&#39;, &#39;</span><span class="o">.</span><span class="n">join</span><span class="p">(</span><span class="n">args</span><span class="o">.</span><span class="n">recipients</span><span class="p">)</span>
<span class="n">msg</span><span class="p">[</span><span class="s1">&#39;From&#39;</span><span class="p">]</span> <span class="o">=</span> <span class="n">args</span><span class="o">.</span><span class="n">sender</span>
<span class="n">msg</span><span class="o">.</span><span class="n">preamble</span> <span class="o">=</span> <span class="s1">&#39;You will not see this in a MIME-aware mail reader.</span><span class="se">\n</span><span class="s1">&#39;</span>
<span class="k">for</span> <span class="n">filename</span> <span class="ow">in</span> <span class="n">os</span><span class="o">.</span><span class="n">listdir</span><span class="p">(</span><span class="n">directory</span><span class="p">):</span>
<span class="n">path</span> <span class="o">=</span> <span class="n">os</span><span class="o">.</span><span class="n">path</span><span class="o">.</span><span class="n">join</span><span class="p">(</span><span class="n">directory</span><span class="p">,</span> <span class="n">filename</span><span class="p">)</span>
<span class="k">if</span> <span class="ow">not</span> <span class="n">os</span><span class="o">.</span><span class="n">path</span><span class="o">.</span><span class="n">isfile</span><span class="p">(</span><span class="n">path</span><span class="p">):</span>
<span class="k">continue</span>
<span class="c1"># Guess the content type based on the file&#39;s extension. Encoding</span>
<span class="c1"># will be ignored, although we should check for simple things like</span>
<span class="c1"># gzip&#39;d or compressed files.</span>
<span class="n">ctype</span><span class="p">,</span> <span class="n">encoding</span> <span class="o">=</span> <span class="n">mimetypes</span><span class="o">.</span><span class="n">guess_type</span><span class="p">(</span><span class="n">path</span><span class="p">)</span>
<span class="k">if</span> <span class="n">ctype</span> <span class="ow">is</span> <span class="kc">None</span> <span class="ow">or</span> <span class="n">encoding</span> <span class="ow">is</span> <span class="ow">not</span> <span class="kc">None</span><span class="p">:</span>
<span class="c1"># No guess could be made, or the file is encoded (compressed), so</span>
<span class="c1"># use a generic bag-of-bits type.</span>
<span class="n">ctype</span> <span class="o">=</span> <span class="s1">&#39;application/octet-stream&#39;</span>
<span class="n">maintype</span><span class="p">,</span> <span class="n">subtype</span> <span class="o">=</span> <span class="n">ctype</span><span class="o">.</span><span class="n">split</span><span class="p">(</span><span class="s1">&#39;/&#39;</span><span class="p">,</span> <span class="mi">1</span><span class="p">)</span>
<span class="k">with</span> <span class="nb">open</span><span class="p">(</span><span class="n">path</span><span class="p">,</span> <span class="s1">&#39;rb&#39;</span><span class="p">)</span> <span class="k">as</span> <span class="n">fp</span><span class="p">:</span>
<span class="n">msg</span><span class="o">.</span><span class="n">add_attachment</span><span class="p">(</span><span class="n">fp</span><span class="o">.</span><span class="n">read</span><span class="p">(),</span>
<span class="n">maintype</span><span class="o">=</span><span class="n">maintype</span><span class="p">,</span>
<span class="n">subtype</span><span class="o">=</span><span class="n">subtype</span><span class="p">,</span>
<span class="n">filename</span><span class="o">=</span><span class="n">filename</span><span class="p">)</span>
<span class="c1"># Now send or store the message</span>
<span class="k">if</span> <span class="n">args</span><span class="o">.</span><span class="n">output</span><span class="p">:</span>
<span class="k">with</span> <span class="nb">open</span><span class="p">(</span><span class="n">args</span><span class="o">.</span><span class="n">output</span><span class="p">,</span> <span class="s1">&#39;wb&#39;</span><span class="p">)</span> <span class="k">as</span> <span class="n">fp</span><span class="p">:</span>
<span class="n">fp</span><span class="o">.</span><span class="n">write</span><span class="p">(</span><span class="n">msg</span><span class="o">.</span><span class="n">as_bytes</span><span class="p">(</span><span class="n">policy</span><span class="o">=</span><span class="n">SMTP</span><span class="p">))</span>
<span class="k">else</span><span class="p">:</span>
<span class="k">with</span> <span class="n">smtplib</span><span class="o">.</span><span class="n">SMTP</span><span class="p">(</span><span class="s1">&#39;localhost&#39;</span><span class="p">)</span> <span class="k">as</span> <span class="n">s</span><span class="p">:</span>
<span class="n">s</span><span class="o">.</span><span class="n">send_message</span><span class="p">(</span><span class="n">msg</span><span class="p">)</span>
<span class="k">if</span> <span class="vm">__name__</span> <span class="o">==</span> <span class="s1">&#39;__main__&#39;</span><span class="p">:</span>
<span class="n">main</span><span class="p">()</span>
</pre></div>
</div>
<p>Here’s an example of how to unpack a MIME message like the one
above, into a directory of files:</p>
<div class="highlight-python3 notranslate"><div class="highlight"><pre><span></span><span class="ch">#!/usr/bin/env python3</span>
<span class="sd">&quot;&quot;&quot;Unpack a MIME message into a directory of files.&quot;&quot;&quot;</span>
<span class="kn">import</span> <span class="nn">os</span>
<span class="kn">import</span> <span class="nn">email</span>
<span class="kn">import</span> <span class="nn">mimetypes</span>
<span class="kn">from</span> <span class="nn">email.policy</span> <span class="k">import</span> <span class="n">default</span>
<span class="kn">from</span> <span class="nn">argparse</span> <span class="k">import</span> <span class="n">ArgumentParser</span>
<span class="k">def</span> <span class="nf">main</span><span class="p">():</span>
<span class="n">parser</span> <span class="o">=</span> <span class="n">ArgumentParser</span><span class="p">(</span><span class="n">description</span><span class="o">=</span><span class="s2">&quot;&quot;&quot;</span><span class="se">\</span>
<span class="s2">Unpack a MIME message into a directory of files.</span>
<span class="s2">&quot;&quot;&quot;</span><span class="p">)</span>
<span class="n">parser</span><span class="o">.</span><span class="n">add_argument</span><span class="p">(</span><span class="s1">&#39;-d&#39;</span><span class="p">,</span> <span class="s1">&#39;--directory&#39;</span><span class="p">,</span> <span class="n">required</span><span class="o">=</span><span class="kc">True</span><span class="p">,</span>
<span class="n">help</span><span class="o">=</span><span class="s2">&quot;&quot;&quot;Unpack the MIME message into the named</span>
<span class="s2"> directory, which will be created if it doesn&#39;t already</span>
<span class="s2"> exist.&quot;&quot;&quot;</span><span class="p">)</span>
<span class="n">parser</span><span class="o">.</span><span class="n">add_argument</span><span class="p">(</span><span class="s1">&#39;msgfile&#39;</span><span class="p">)</span>
<span class="n">args</span> <span class="o">=</span> <span class="n">parser</span><span class="o">.</span><span class="n">parse_args</span><span class="p">()</span>
<span class="k">with</span> <span class="nb">open</span><span class="p">(</span><span class="n">args</span><span class="o">.</span><span class="n">msgfile</span><span class="p">,</span> <span class="s1">&#39;rb&#39;</span><span class="p">)</span> <span class="k">as</span> <span class="n">fp</span><span class="p">:</span>
<span class="n">msg</span> <span class="o">=</span> <span class="n">email</span><span class="o">.</span><span class="n">message_from_binary_file</span><span class="p">(</span><span class="n">fp</span><span class="p">,</span> <span class="n">policy</span><span class="o">=</span><span class="n">default</span><span class="p">)</span>
<span class="k">try</span><span class="p">:</span>
<span class="n">os</span><span class="o">.</span><span class="n">mkdir</span><span class="p">(</span><span class="n">args</span><span class="o">.</span><span class="n">directory</span><span class="p">)</span>
<span class="k">except</span> <span class="ne">FileExistsError</span><span class="p">:</span>
<span class="k">pass</span>
<span class="n">counter</span> <span class="o">=</span> <span class="mi">1</span>
<span class="k">for</span> <span class="n">part</span> <span class="ow">in</span> <span class="n">msg</span><span class="o">.</span><span class="n">walk</span><span class="p">():</span>
<span class="c1"># multipart/* are just containers</span>
<span class="k">if</span> <span class="n">part</span><span class="o">.</span><span class="n">get_content_maintype</span><span class="p">()</span> <span class="o">==</span> <span class="s1">&#39;multipart&#39;</span><span class="p">:</span>
<span class="k">continue</span>
<span class="c1"># Applications should really sanitize the given filename so that an</span>
<span class="c1"># email message can&#39;t be used to overwrite important files</span>
<span class="n">filename</span> <span class="o">=</span> <span class="n">part</span><span class="o">.</span><span class="n">get_filename</span><span class="p">()</span>
<span class="k">if</span> <span class="ow">not</span> <span class="n">filename</span><span class="p">:</span>
<span class="n">ext</span> <span class="o">=</span> <span class="n">mimetypes</span><span class="o">.</span><span class="n">guess_extension</span><span class="p">(</span><span class="n">part</span><span class="o">.</span><span class="n">get_content_type</span><span class="p">())</span>
<span class="k">if</span> <span class="ow">not</span> <span class="n">ext</span><span class="p">:</span>
<span class="c1"># Use a generic bag-of-bits extension</span>
<span class="n">ext</span> <span class="o">=</span> <span class="s1">&#39;.bin&#39;</span>
<span class="n">filename</span> <span class="o">=</span> <span class="s1">&#39;part-</span><span class="si">%03d%s</span><span class="s1">&#39;</span> <span class="o">%</span> <span class="p">(</span><span class="n">counter</span><span class="p">,</span> <span class="n">ext</span><span class="p">)</span>
<span class="n">counter</span> <span class="o">+=</span> <span class="mi">1</span>
<span class="k">with</span> <span class="nb">open</span><span class="p">(</span><span class="n">os</span><span class="o">.</span><span class="n">path</span><span class="o">.</span><span class="n">join</span><span class="p">(</span><span class="n">args</span><span class="o">.</span><span class="n">directory</span><span class="p">,</span> <span class="n">filename</span><span class="p">),</span> <span class="s1">&#39;wb&#39;</span><span class="p">)</span> <span class="k">as</span> <span class="n">fp</span><span class="p">:</span>
<span class="n">fp</span><span class="o">.</span><span class="n">write</span><span class="p">(</span><span class="n">part</span><span class="o">.</span><span class="n">get_payload</span><span class="p">(</span><span class="n">decode</span><span class="o">=</span><span class="kc">True</span><span class="p">))</span>
<span class="k">if</span> <span class="vm">__name__</span> <span class="o">==</span> <span class="s1">&#39;__main__&#39;</span><span class="p">:</span>
<span class="n">main</span><span class="p">()</span>
</pre></div>
</div>
<p>Here’s an example of how to create an HTML message with an alternative plain
text version. To make things a bit more interesting, we include a related
image in the html part, and we save a copy of what we are going to send to
disk, as well as sending it.</p>
<div class="highlight-python3 notranslate"><div class="highlight"><pre><span></span><span class="ch">#!/usr/bin/env python3</span>
<span class="kn">import</span> <span class="nn">smtplib</span>
<span class="kn">from</span> <span class="nn">email.message</span> <span class="k">import</span> <span class="n">EmailMessage</span>
<span class="kn">from</span> <span class="nn">email.headerregistry</span> <span class="k">import</span> <span class="n">Address</span>
<span class="kn">from</span> <span class="nn">email.utils</span> <span class="k">import</span> <span class="n">make_msgid</span>
<span class="c1"># Create the base text message.</span>
<span class="n">msg</span> <span class="o">=</span> <span class="n">EmailMessage</span><span class="p">()</span>
<span class="n">msg</span><span class="p">[</span><span class="s1">&#39;Subject&#39;</span><span class="p">]</span> <span class="o">=</span> <span class="s2">&quot;Ayons asperges pour le déjeuner&quot;</span>
<span class="n">msg</span><span class="p">[</span><span class="s1">&#39;From&#39;</span><span class="p">]</span> <span class="o">=</span> <span class="n">Address</span><span class="p">(</span><span class="s2">&quot;Pepé Le Pew&quot;</span><span class="p">,</span> <span class="s2">&quot;pepe&quot;</span><span class="p">,</span> <span class="s2">&quot;example.com&quot;</span><span class="p">)</span>
<span class="n">msg</span><span class="p">[</span><span class="s1">&#39;To&#39;</span><span class="p">]</span> <span class="o">=</span> <span class="p">(</span><span class="n">Address</span><span class="p">(</span><span class="s2">&quot;Penelope Pussycat&quot;</span><span class="p">,</span> <span class="s2">&quot;penelope&quot;</span><span class="p">,</span> <span class="s2">&quot;example.com&quot;</span><span class="p">),</span>
<span class="n">Address</span><span class="p">(</span><span class="s2">&quot;Fabrette Pussycat&quot;</span><span class="p">,</span> <span class="s2">&quot;fabrette&quot;</span><span class="p">,</span> <span class="s2">&quot;example.com&quot;</span><span class="p">))</span>
<span class="n">msg</span><span class="o">.</span><span class="n">set_content</span><span class="p">(</span><span class="s2">&quot;&quot;&quot;</span><span class="se">\</span>
<span class="s2">Salut!</span>
<span class="s2">Cela ressemble à un excellent recipie[1] déjeuner.</span>
<span class="s2">[1] http://www.yummly.com/recipe/Roasted-Asparagus-Epicurious-203718</span>
<span class="s2">--Pepé</span>
<span class="s2">&quot;&quot;&quot;</span><span class="p">)</span>
<span class="c1"># Add the html version. This converts the message into a multipart/alternative</span>
<span class="c1"># container, with the original text message as the first part and the new html</span>
<span class="c1"># message as the second part.</span>
<span class="n">asparagus_cid</span> <span class="o">=</span> <span class="n">make_msgid</span><span class="p">()</span>
<span class="n">msg</span><span class="o">.</span><span class="n">add_alternative</span><span class="p">(</span><span class="s2">&quot;&quot;&quot;</span><span class="se">\</span>
<span class="s2">&lt;html&gt;</span>
<span class="s2"> &lt;head&gt;&lt;/head&gt;</span>
<span class="s2"> &lt;body&gt;</span>
<span class="s2"> &lt;p&gt;Salut!&lt;/p&gt;</span>
<span class="s2"> &lt;p&gt;Cela ressemble à un excellent</span>
<span class="s2"> &lt;a href=&quot;http://www.yummly.com/recipe/Roasted-Asparagus-Epicurious-203718&quot;&gt;</span>
<span class="s2"> recipie</span>
<span class="s2"> &lt;/a&gt; déjeuner.</span>
<span class="s2"> &lt;/p&gt;</span>
<span class="s2"> &lt;img src=&quot;cid:</span><span class="si">{asparagus_cid}</span><span class="s2">&quot; /&gt;</span>
<span class="s2"> &lt;/body&gt;</span>
<span class="s2">&lt;/html&gt;</span>
<span class="s2">&quot;&quot;&quot;</span><span class="o">.</span><span class="n">format</span><span class="p">(</span><span class="n">asparagus_cid</span><span class="o">=</span><span class="n">asparagus_cid</span><span class="p">[</span><span class="mi">1</span><span class="p">:</span><span class="o">-</span><span class="mi">1</span><span class="p">]),</span> <span class="n">subtype</span><span class="o">=</span><span class="s1">&#39;html&#39;</span><span class="p">)</span>
<span class="c1"># note that we needed to peel the &lt;&gt; off the msgid for use in the html.</span>
<span class="c1"># Now add the related image to the html part.</span>
<span class="k">with</span> <span class="nb">open</span><span class="p">(</span><span class="s2">&quot;roasted-asparagus.jpg&quot;</span><span class="p">,</span> <span class="s1">&#39;rb&#39;</span><span class="p">)</span> <span class="k">as</span> <span class="n">img</span><span class="p">:</span>
<span class="n">msg</span><span class="o">.</span><span class="n">get_payload</span><span class="p">()[</span><span class="mi">1</span><span class="p">]</span><span class="o">.</span><span class="n">add_related</span><span class="p">(</span><span class="n">img</span><span class="o">.</span><span class="n">read</span><span class="p">(),</span> <span class="s1">&#39;image&#39;</span><span class="p">,</span> <span class="s1">&#39;jpeg&#39;</span><span class="p">,</span>
<span class="n">cid</span><span class="o">=</span><span class="n">asparagus_cid</span><span class="p">)</span>
<span class="c1"># Make a local copy of what we are going to send.</span>
<span class="k">with</span> <span class="nb">open</span><span class="p">(</span><span class="s1">&#39;outgoing.msg&#39;</span><span class="p">,</span> <span class="s1">&#39;wb&#39;</span><span class="p">)</span> <span class="k">as</span> <span class="n">f</span><span class="p">:</span>
<span class="n">f</span><span class="o">.</span><span class="n">write</span><span class="p">(</span><span class="nb">bytes</span><span class="p">(</span><span class="n">msg</span><span class="p">))</span>
<span class="c1"># Send the message via local SMTP server.</span>
<span class="k">with</span> <span class="n">smtplib</span><span class="o">.</span><span class="n">SMTP</span><span class="p">(</span><span class="s1">&#39;localhost&#39;</span><span class="p">)</span> <span class="k">as</span> <span class="n">s</span><span class="p">:</span>
<span class="n">s</span><span class="o">.</span><span class="n">send_message</span><span class="p">(</span><span class="n">msg</span><span class="p">)</span>
</pre></div>
</div>
<p>If we were sent the message from the last example, here is one way we could
process it:</p>
<div class="highlight-python3 notranslate"><div class="highlight"><pre><span></span><span class="kn">import</span> <span class="nn">os</span>
<span class="kn">import</span> <span class="nn">sys</span>
<span class="kn">import</span> <span class="nn">tempfile</span>
<span class="kn">import</span> <span class="nn">mimetypes</span>
<span class="kn">import</span> <span class="nn">webbrowser</span>
<span class="c1"># Import the email modules we&#39;ll need</span>
<span class="kn">from</span> <span class="nn">email</span> <span class="k">import</span> <span class="n">policy</span>
<span class="kn">from</span> <span class="nn">email.parser</span> <span class="k">import</span> <span class="n">BytesParser</span>
<span class="c1"># An imaginary module that would make this work and be safe.</span>
<span class="kn">from</span> <span class="nn">imaginary</span> <span class="k">import</span> <span class="n">magic_html_parser</span>
<span class="c1"># In a real program you&#39;d get the filename from the arguments.</span>
<span class="k">with</span> <span class="nb">open</span><span class="p">(</span><span class="s1">&#39;outgoing.msg&#39;</span><span class="p">,</span> <span class="s1">&#39;rb&#39;</span><span class="p">)</span> <span class="k">as</span> <span class="n">fp</span><span class="p">:</span>
<span class="n">msg</span> <span class="o">=</span> <span class="n">BytesParser</span><span class="p">(</span><span class="n">policy</span><span class="o">=</span><span class="n">policy</span><span class="o">.</span><span class="n">default</span><span class="p">)</span><span class="o">.</span><span class="n">parse</span><span class="p">(</span><span class="n">fp</span><span class="p">)</span>
<span class="c1"># Now the header items can be accessed as a dictionary, and any non-ASCII will</span>
<span class="c1"># be converted to unicode:</span>
<span class="nb">print</span><span class="p">(</span><span class="s1">&#39;To:&#39;</span><span class="p">,</span> <span class="n">msg</span><span class="p">[</span><span class="s1">&#39;to&#39;</span><span class="p">])</span>
<span class="nb">print</span><span class="p">(</span><span class="s1">&#39;From:&#39;</span><span class="p">,</span> <span class="n">msg</span><span class="p">[</span><span class="s1">&#39;from&#39;</span><span class="p">])</span>
<span class="nb">print</span><span class="p">(</span><span class="s1">&#39;Subject:&#39;</span><span class="p">,</span> <span class="n">msg</span><span class="p">[</span><span class="s1">&#39;subject&#39;</span><span class="p">])</span>
<span class="c1"># If we want to print a preview of the message content, we can extract whatever</span>
<span class="c1"># the least formatted payload is and print the first three lines. Of course,</span>
<span class="c1"># if the message has no plain text part printing the first three lines of html</span>
<span class="c1"># is probably useless, but this is just a conceptual example.</span>
<span class="n">simplest</span> <span class="o">=</span> <span class="n">msg</span><span class="o">.</span><span class="n">get_body</span><span class="p">(</span><span class="n">preferencelist</span><span class="o">=</span><span class="p">(</span><span class="s1">&#39;plain&#39;</span><span class="p">,</span> <span class="s1">&#39;html&#39;</span><span class="p">))</span>
<span class="nb">print</span><span class="p">()</span>
<span class="nb">print</span><span class="p">(</span><span class="s1">&#39;&#39;</span><span class="o">.</span><span class="n">join</span><span class="p">(</span><span class="n">simplest</span><span class="o">.</span><span class="n">get_content</span><span class="p">()</span><span class="o">.</span><span class="n">splitlines</span><span class="p">(</span><span class="n">keepends</span><span class="o">=</span><span class="kc">True</span><span class="p">)[:</span><span class="mi">3</span><span class="p">]))</span>
<span class="n">ans</span> <span class="o">=</span> <span class="nb">input</span><span class="p">(</span><span class="s2">&quot;View full message?&quot;</span><span class="p">)</span>
<span class="k">if</span> <span class="n">ans</span><span class="o">.</span><span class="n">lower</span><span class="p">()[</span><span class="mi">0</span><span class="p">]</span> <span class="o">==</span> <span class="s1">&#39;n&#39;</span><span class="p">:</span>
<span class="n">sys</span><span class="o">.</span><span class="n">exit</span><span class="p">()</span>
<span class="c1"># We can extract the richest alternative in order to display it:</span>
<span class="n">richest</span> <span class="o">=</span> <span class="n">msg</span><span class="o">.</span><span class="n">get_body</span><span class="p">()</span>
<span class="n">partfiles</span> <span class="o">=</span> <span class="p">{}</span>
<span class="k">if</span> <span class="n">richest</span><span class="p">[</span><span class="s1">&#39;content-type&#39;</span><span class="p">]</span><span class="o">.</span><span class="n">maintype</span> <span class="o">==</span> <span class="s1">&#39;text&#39;</span><span class="p">:</span>
<span class="k">if</span> <span class="n">richest</span><span class="p">[</span><span class="s1">&#39;content-type&#39;</span><span class="p">]</span><span class="o">.</span><span class="n">subtype</span> <span class="o">==</span> <span class="s1">&#39;plain&#39;</span><span class="p">:</span>
<span class="k">for</span> <span class="n">line</span> <span class="ow">in</span> <span class="n">richest</span><span class="o">.</span><span class="n">get_content</span><span class="p">()</span><span class="o">.</span><span class="n">splitlines</span><span class="p">():</span>
<span class="nb">print</span><span class="p">(</span><span class="n">line</span><span class="p">)</span>
<span class="n">sys</span><span class="o">.</span><span class="n">exit</span><span class="p">()</span>
<span class="k">elif</span> <span class="n">richest</span><span class="p">[</span><span class="s1">&#39;content-type&#39;</span><span class="p">]</span><span class="o">.</span><span class="n">subtype</span> <span class="o">==</span> <span class="s1">&#39;html&#39;</span><span class="p">:</span>
<span class="n">body</span> <span class="o">=</span> <span class="n">richest</span>
<span class="k">else</span><span class="p">:</span>
<span class="nb">print</span><span class="p">(</span><span class="s2">&quot;Don&#39;t know how to display </span><span class="si">{}</span><span class="s2">&quot;</span><span class="o">.</span><span class="n">format</span><span class="p">(</span><span class="n">richest</span><span class="o">.</span><span class="n">get_content_type</span><span class="p">()))</span>
<span class="n">sys</span><span class="o">.</span><span class="n">exit</span><span class="p">()</span>
<span class="k">elif</span> <span class="n">richest</span><span class="p">[</span><span class="s1">&#39;content-type&#39;</span><span class="p">]</span><span class="o">.</span><span class="n">content_type</span> <span class="o">==</span> <span class="s1">&#39;multipart/related&#39;</span><span class="p">:</span>
<span class="n">body</span> <span class="o">=</span> <span class="n">richest</span><span class="o">.</span><span class="n">get_body</span><span class="p">(</span><span class="n">preferencelist</span><span class="o">=</span><span class="p">(</span><span class="s1">&#39;html&#39;</span><span class="p">))</span>
<span class="k">for</span> <span class="n">part</span> <span class="ow">in</span> <span class="n">richest</span><span class="o">.</span><span class="n">iter_attachments</span><span class="p">():</span>
<span class="n">fn</span> <span class="o">=</span> <span class="n">part</span><span class="o">.</span><span class="n">get_filename</span><span class="p">()</span>
<span class="k">if</span> <span class="n">fn</span><span class="p">:</span>
<span class="n">extension</span> <span class="o">=</span> <span class="n">os</span><span class="o">.</span><span class="n">path</span><span class="o">.</span><span class="n">splitext</span><span class="p">(</span><span class="n">part</span><span class="o">.</span><span class="n">get_filename</span><span class="p">())[</span><span class="mi">1</span><span class="p">]</span>
<span class="k">else</span><span class="p">:</span>
<span class="n">extension</span> <span class="o">=</span> <span class="n">mimetypes</span><span class="o">.</span><span class="n">guess_extension</span><span class="p">(</span><span class="n">part</span><span class="o">.</span><span class="n">get_content_type</span><span class="p">())</span>
<span class="k">with</span> <span class="n">tempfile</span><span class="o">.</span><span class="n">NamedTemporaryFile</span><span class="p">(</span><span class="n">suffix</span><span class="o">=</span><span class="n">extension</span><span class="p">,</span> <span class="n">delete</span><span class="o">=</span><span class="kc">False</span><span class="p">)</span> <span class="k">as</span> <span class="n">f</span><span class="p">:</span>
<span class="n">f</span><span class="o">.</span><span class="n">write</span><span class="p">(</span><span class="n">part</span><span class="o">.</span><span class="n">get_content</span><span class="p">())</span>
<span class="c1"># again strip the &lt;&gt; to go from email form of cid to html form.</span>
<span class="n">partfiles</span><span class="p">[</span><span class="n">part</span><span class="p">[</span><span class="s1">&#39;content-id&#39;</span><span class="p">][</span><span class="mi">1</span><span class="p">:</span><span class="o">-</span><span class="mi">1</span><span class="p">]]</span> <span class="o">=</span> <span class="n">f</span><span class="o">.</span><span class="n">name</span>
<span class="k">else</span><span class="p">:</span>
<span class="nb">print</span><span class="p">(</span><span class="s2">&quot;Don&#39;t know how to display </span><span class="si">{}</span><span class="s2">&quot;</span><span class="o">.</span><span class="n">format</span><span class="p">(</span><span class="n">richest</span><span class="o">.</span><span class="n">get_content_type</span><span class="p">()))</span>
<span class="n">sys</span><span class="o">.</span><span class="n">exit</span><span class="p">()</span>
<span class="k">with</span> <span class="n">tempfile</span><span class="o">.</span><span class="n">NamedTemporaryFile</span><span class="p">(</span><span class="n">mode</span><span class="o">=</span><span class="s1">&#39;w&#39;</span><span class="p">,</span> <span class="n">delete</span><span class="o">=</span><span class="kc">False</span><span class="p">)</span> <span class="k">as</span> <span class="n">f</span><span class="p">:</span>
<span class="c1"># The magic_html_parser has to rewrite the href=&quot;cid:....&quot; attributes to</span>
<span class="c1"># point to the filenames in partfiles. It also has to do a safety-sanitize</span>
<span class="c1"># of the html. It could be written using html.parser.</span>
<span class="n">f</span><span class="o">.</span><span class="n">write</span><span class="p">(</span><span class="n">magic_html_parser</span><span class="p">(</span><span class="n">body</span><span class="o">.</span><span class="n">get_content</span><span class="p">(),</span> <span class="n">partfiles</span><span class="p">))</span>
<span class="n">webbrowser</span><span class="o">.</span><span class="n">open</span><span class="p">(</span><span class="n">f</span><span class="o">.</span><span class="n">name</span><span class="p">)</span>
<span class="n">os</span><span class="o">.</span><span class="n">remove</span><span class="p">(</span><span class="n">f</span><span class="o">.</span><span class="n">name</span><span class="p">)</span>
<span class="k">for</span> <span class="n">fn</span> <span class="ow">in</span> <span class="n">partfiles</span><span class="o">.</span><span class="n">values</span><span class="p">():</span>
<span class="n">os</span><span class="o">.</span><span class="n">remove</span><span class="p">(</span><span class="n">fn</span><span class="p">)</span>
<span class="c1"># Of course, there are lots of email messages that could break this simple</span>
<span class="c1"># minded program, but it will handle the most common ones.</span>
</pre></div>
</div>
<p>Up to the prompt, the output from the above is:</p>
<div class="highlight-none notranslate"><div class="highlight"><pre><span></span>To: Penelope Pussycat &lt;penelope@example.com&gt;, Fabrette Pussycat &lt;fabrette@example.com&gt;
From: Pepé Le Pew &lt;pepe@example.com&gt;
Subject: Ayons asperges pour le déjeuner
Salut!
Cela ressemble à un excellent recipie[1] déjeuner.
</pre></div>
</div>
<p class="rubric">Footnotes</p>
<dl class="footnote brackets">
<dt class="label" id="id3"><span class="brackets"><a class="fn-backref" href="#id2">1</a></span></dt>
<dd><p>Thanks to Matthew Dixon Cowles for the original inspiration and examples.</p>
</dd>
</dl>
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