API - allow EMAIL_URL without authentication - fix #127

docs/_sources/installation.rst.txt

@@ -209,6 +209,9 @@ To send emails, a valid ``EMAIL_URL`` must be provided:
 - with SSL: ``smtp://username:password@smtp.example.com:465/?ssl=True``
 - with STARTTLS: ``smtp://username:password@smtp.example.com:587/?tls=True``
 
+.. versionadded:: 0.5.3
+
+Credentials can be omitted: ``smtp://smtp.example.com:25``
 
 Map tile server
 ^^^^^^^^^^^^^^^

docs/installation.html

@@ -458,6 +458,10 @@ see <a class="reference external" href="https://docs.sqlalchemy.org/en/13/core/p
 <li><p>with SSL: <code class="docutils literal notranslate"><span class="pre">smtp://username:password&#64;smtp.example.com:465/?ssl=True</span></code></p></li>
 <li><p>with STARTTLS: <code class="docutils literal notranslate"><span class="pre">smtp://username:password&#64;smtp.example.com:587/?tls=True</span></code></p></li>
 </ul>
+<div class="versionadded">
+<p><span class="versionmodified added">New in version 0.5.3.</span></p>
+</div>
+<p>Credentials can be omitted: <code class="docutils literal notranslate"><span class="pre">smtp://smtp.example.com:25</span></code></p>
 </section>
 <section id="map-tile-server">
 <h3>Map tile server<a class="headerlink" href="#map-tile-server" title="Permalink to this headline">¶</a></h3>