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<p dir="auto">I found the answer to this question (original post: <a href="https://www.mail-archive.com/mailmate@lists.freron.com/msg14711.html">https://www.mail-archive.com/mailmate@lists.freron.com/msg14711.html</a>)</p>
<p dir="auto">You can find the list of SMTP servers at <em>~/Library/Application Support/MailMate/Submission.plist</em></p>
<p dir="auto">This is applicable only if you have the hidden preference <strong>com.freron.MailMate MmSMTPAlternativeEnabled</strong> enabled and it contains SMTP servers you no longer use</p>
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