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How to check SSL cert a mail server using SMTP commands

Anyone know how open a SMTP conversation with a mail server (over the SSL port, and not 25/110) and view info for the SSL cert is it, using SMTP commands?

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    • Platform doesn't matter really in this case. He's asking how to connect remotely to a server and view info on its SSL certs.

You're not going to be able to get any useful information only using SMTP commands. You'll need to use something that understands SSL, like OpenSSL's s_client. Something like this should work:

$ openssl s_client -starttls smtp -crlf -connect
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