https://bas-man.dev/tags/ports/Recent content in Ports on Bas-Man's MusingsHugoenFri, 30 Jul 2021 23:00:00 +0900https://bas-man.dev/cheatsheets/general/snippets/verify-imap-submission/Fri, 30 Jul 2021 23:00:00 +0900https://bas-man.dev/cheatsheets/general/snippets/verify-imap-submission/<p>These hints were taken from <a href="https://support.plesk.com/hc/en-us/articles/213961665-How-to-verify-that-SSL-for-IMAP-POP3-SMTP-works-and-a-proper-SSL-certificate-is-in-use">Support Plesk</a></p> <h2 id="imap-via-ssl-using-port-993">IMAP via SSL using port 993</h2> <div class="highlight"><pre tabindex="0" class="chroma"><code class="language-shell" data-lang="shell"><span class="line"><span class="cl">openssl s_client -showcerts -connect mail.example.com:993 -servername mail.example.com </span></span></code></pre></div><h2 id="smtp-via-tlsstarttls-using-port-25-or-587">SMTP via TLS/StartTLS using port 25 or 587</h2> <div class="highlight"><pre tabindex="0" class="chroma"><code class="language-shell" data-lang="shell"><span class="line"><span class="cl">openssl s_client -starttls smtp -showcerts -connect mail.example.com:25 -servername mail.example.com </span></span></code></pre></div>