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class="container" id="main-content" tabindex="-1"><div class="post"><article class="post-block h-entry"><div class="post-meta p-author h-card visually-hidden"><img class="author-avatar u-photo" src="../favicon.png" alt="Cytrogen"><span class="p-name">Cytrogen</span><a class="u-url" href="https://cytrogen.icu">https://cytrogen.icu</a></div><a class="post-permalink u-url u-uid visually-hidden" href="https://cytrogen.icu/posts/d995.html">永久链接</a><div class="p-summary visually-hidden"><p>该文档讲述了如何使用 Flask-Mail 库和 Ionos 的邮箱来发送邮件。</p></div><div class="visually-hidden"><a class="p-category" href="../categories/%E7%BC%96%E7%A8%8B%E7%AC%94%E8%AE%B0/">编程笔记</a><a class="p-category" href="../tags/Python/">Python</a><a class="p-category" href="../tags/Flask/">Flask</a><a class="p-category" href="../tags/Ionos/">Ionos</a></div><h1 class="post-title p-name">使用 Flask-Mail 和 Ionos 邮箱发送邮件</h1><div class="post-info"><time class="post-date dt-published" datetime="2022-11-06T18:49:48.000Z">11/6/2022</time><time class="dt-updated visually-hidden" datetime="2026-02-09T17:16:55.009Z"></time></div><div class="post-content e-content"><html><head></head><body><p>该文档讲述了如何使用 Flask-Mail 库和 Ionos 的邮箱来发送邮件。</p>
<span id="more"></span>
<div class="danger">
开始阅读前，需要知道：
<ul>
<li>Flask 是一个使用 Python 编写的 Web 应用框架</li>
<li>Flask-Mail 提供了接口以让 Web 应用程序向客户端发送邮件</li>
<li>Flask 和 Flask-Mail 都可以使用 <code>pip install</code> 来安装</li>
<li>Ionos 是一家网络托管公司，提供域名注册、SSL 证书、电子邮件等服务</li>
<li>Ionos 的电子邮件可在域名注册后获得</li>
</ul>
</div>
<h1 id="配置flask-mail"><a class="markdownIt-Anchor" href="#配置flask-mail"></a> 配置 Flask-Mail</h1>
<blockquote>
<p>请先确保你已经从 Ionos <strong>购买</strong> 了一个域名，且创建了一个邮箱。</p>
</blockquote>
<ol>
<li>
<p>在 <strong><a target="_blank" rel="noopener" href="http://app.py">app.py</a></strong> 中输入以下几行进行配置。</p>
<p>Ionos 邮箱可在 <a target="_blank" rel="noopener" href="https://my.ionos.com/email-overview"> Ionos 的邮箱概述</a> 中找到。</p>
<figure class="highlight python"><figcaption><span>app.py</span></figcaption><table><tbody><tr><td class="gutter"><pre><span class="line">1</span><br><span class="line">2</span><br><span class="line">3</span><br><span class="line">4</span><br><span class="line">5</span><br><span class="line">6</span><br></pre></td><td class="code"><pre><span class="line">app.config[<span class="string">'MAIL_SERVER'</span>] =<span class="string">'smtp.ionos.com'</span></span><br><span class="line">app.config[<span class="string">'MAIL_PORT'</span>] = <span class="number">587</span></span><br><span class="line">app.config[<span class="string">'MAIL_USERNAME'</span>] = <span class="string">'你的Ionos邮箱'</span></span><br><span class="line">app.config[<span class="string">'MAIL_PASSWORD'</span>] = <span class="string">'你的Ionos邮箱密码'</span></span><br><span class="line">app.config[<span class="string">'MAIL_USE_TLS'</span>] = <span class="literal">True</span></span><br><span class="line">app.config[<span class="string">'MAIL_USE_SSL'</span>] = <span class="literal">False</span></span><br></pre></td></tr></tbody></table></figure>
</li>
<li>
<p>配置完毕后加上这行代码。</p>
<p>该行代码必须写在以上配置的后面，否则会出错。</p>
<figure class="highlight python"><figcaption><span>app.py</span></figcaption><table><tbody><tr><td class="gutter"><pre><span class="line">1</span><br></pre></td><td class="code"><pre><span class="line">mail = Mail(app)</span><br></pre></td></tr></tbody></table></figure>
</li>
</ol>
<h1 id="发送邮件"><a class="markdownIt-Anchor" href="#发送邮件"></a> 发送邮件</h1>
<ol>
<li>
<p>导入 Flask-Mail 包。</p>
<figure class="highlight python"><figcaption><span>app.py</span></figcaption><table><tbody><tr><td class="gutter"><pre><span class="line">1</span><br></pre></td><td class="code"><pre><span class="line"><span class="keyword">from</span> flask_mail <span class="keyword">import</span> Mail, Message</span><br></pre></td></tr></tbody></table></figure>
</li>
<li>
<p>将 URL 与函数绑定。</p>
<figure class="highlight python"><figcaption><span>app.py</span></figcaption><table><tbody><tr><td class="gutter"><pre><span class="line">1</span><br><span class="line">2</span><br><span class="line">3</span><br></pre></td><td class="code"><pre><span class="line"><span class="meta">@app.route(<span class="params"><span class="string">'/'</span></span>)</span></span><br><span class="line"><span class="keyword">def</span> <span class="title function_">index</span>():</span><br><span class="line"> <span class="keyword">return</span> <span class="string">"Hey!"</span></span><br></pre></td></tr></tbody></table></figure>
</li>
<li>
<p>创建 Message 实例和邮件内容。</p>
<figure class="highlight python"><figcaption><span>app.py</span></figcaption><table><tbody><tr><td class="gutter"><pre><span class="line">1</span><br><span class="line">2</span><br><span class="line">3</span><br><span class="line">4</span><br><span class="line">5</span><br></pre></td><td class="code"><pre><span class="line">msg = Message(<span class="string">"这里是主题"</span>,</span><br><span class="line"> sender=<span class="string">"你的Ionos邮箱"</span>,</span><br><span class="line"> recipients=[<span class="string">'收件人的邮箱'</span>])</span><br><span class="line"></span><br><span class="line">msg.body = <span class="string">"这里是邮件内容"</span></span><br></pre></td></tr></tbody></table></figure>
</li>
<li>
<p>使用 Mail 实例发送邮件。</p>
<figure class="highlight python"><figcaption><span>app.py</span></figcaption><table><tbody><tr><td class="gutter"><pre><span class="line">1</span><br></pre></td><td class="code"><pre><span class="line">mail.send(msg)</span><br></pre></td></tr></tbody></table></figure>
</li>
<li>
<p>整体代码如下。</p>
<figure class="highlight python"><figcaption><span>app.py</span></figcaption><table><tbody><tr><td class="gutter"><pre><span class="line">1</span><br><span class="line">2</span><br><span class="line">3</span><br><span class="line">4</span><br><span class="line">5</span><br><span class="line">6</span><br><span class="line">7</span><br><span class="line">8</span><br><span class="line">9</span><br></pre></td><td class="code"><pre><span class="line"><span class="meta">@app.route(<span class="params"><span class="string">'/'</span></span>)</span></span><br><span class="line"><span class="keyword">def</span> <span class="title function_">index</span>():</span><br><span class="line"> msg = Message(<span class="string">"这里是主题"</span>,</span><br><span class="line"> sender=<span class="string">"你的Ionos邮箱"</span>,</span><br><span class="line"> recipients=[<span class="string">'收件人的邮箱'</span>])</span><br><span class="line"> msg.body = <span class="string">"这里是邮件内容"</span></span><br><span class="line"> mail.send(msg)</span><br><span class="line"> </span><br><span class="line"> <span class="keyword">return</span> <span class="string">"Hey!"</span></span><br></pre></td></tr></tbody></table></figure></li>
</ol>
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