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title: Thunderbird and Google SMTP timeouts
date: 2014-09-12 17:00:00
updated: 2014-09-19 23:44:00
coordinates: 50.86505 4.70068
proofread: yes
<div class="narrow-col">
<p>TL;DR: My <abbr title="Virtual Private Network">VPN</abbr>'s <abbr title="Internet Protocol">IP</abbr> address has been blacklisted by Google, which has prevented Thunderbird from sending e-mails.</p>
<p>I switched from Apple Mail to <a href="" title="Open-source e-mail client from Mozilla">Mozilla Thunderbird</a> in my efforts to use more open-source software, and also because Apple removed the option to <a href="" title="How can in Mavericks show a message's plain text alternative?">read your messages in plain text</a> after <abbr title="Operating System">OS</abbr> X <a href="" title="OS X Mavericks @ Wikipedia">Mavericks</a>.</p>
<p>Adding a <a href="" title="Free advertising-supported e-mail service by Google">Gmail</a> account to Thunderbird was easy enough and Thunderbird started syncing my messages with Google straight away. Sending a new message was a different story. Here are the Google <abbr title="Simple Mail Transfer Protocol">SMTP</abbr> server settings for an <abbr title="Secure Sockets Layer">SSL</abbr>/<abbr title="Transport Layer Security">TLS</abbr> connection:</p>
<dt>Server name</dt>
<dt>Connection security</dt>
<dd><abbr title="Secure Sockets Layer">SSL</abbr>/<abbr title="Transport Layer Security">TLS</abbr></dd>
<dt>Authentication method</dt>
<dd>normal password</dd>
<dt>User name</dt>
<p>When I clicked send on the e-mail, Thunderbird tried sending it with the following message:</p>
<blockquote>Connecting to</blockquote>
<p>You wait a few seconds and&hellip; timeout:</p>
Sending of message failed.<br />
The message could not be sent because the connection to SMTP server timed out. Try again or contact your network administrator.
<p>The internet told me to change the <a href="" title="Change connection timeout @ Mozillazine">connection timeout settings</a>, verify my <a href="" title="Thunderbird and Gmail @ Mozilla Support"><abbr title="Simple Mail Transfer Protocol">SMTP</abbr> settings</a>, <a href="">unlock my Gmail account</a> with the <abbr title="Completely Automated Public Turing test to tell Computers and Humans Apart">CAPTCHA</abbr> or disable two-factor authentication (I am using <a href="" title="Sign in using App Passwords @ Google Support">App passwords</a>). But none of that worked.</p>
<p>I found an article about <a href="" title="Email bounces because your IP address is blacklisted @ Google Support"><abbr title="Internet Protocol">IP</abbr> address blacklisting</a> and that finally rang a bell: my <abbr title="Virtual Private Network">VPN</abbr>!</p>
<p>I run almost all my internet traffic through a <abbr title="Virtual Private Network">VPN</abbr> and didn't think it was related to my Thunderbird Gmail issues but, sure enough, I disabled the <abbr title="Virtual Private Network">VPN</abbr> and there it went, e-mail sent. Guess spammers like my <abbr title="Virtual Private Network">VPN</abbr> provider as well.</p>
<p>Now, I'm not sure why this was never an issue with the Mail app - maybe Apple uses different <abbr title="Simple Mail Transfer Protocol">SMTP</abbr> settings when you configure a Gmail account?</p>