Tell me more ×
Server Fault is a question and answer site for professional system and network administrators. It's 100% free, no registration required.
up vote 0 down vote favorite

testing ssl cert on server using a web service. https, imaps and pop3s all check, but smtps yields the message 

"we advise you not to submit any confidential or personal data to this website
because a secure connection could not be established with this website."

running postfix

tls logging:

connect from s097.networking4all.com[213.249.64.242]
lost connection after UNKNOWN from s097.networking4all.com[213.249.64.242]
disconnect from s097.networking4all.com[213.249.64.242]

these work correctly: 

telnet mydomain.net 587
openssl s_client -starttls smtp -crlf -connect mydomain.net:587

but cannot get email using ssl to log into either 587 or 564 - get same "UNKNOWN" problem. email smtp w/o ssh works fine.

the test site is http://www.networking4all.com/en/support/tools/site+check/

share|improve this question
You say the openssl s_client command works correctly but you cannot get email in using the 587 port. What happens if you actually try to manually do an SMTP session within the openssl command prompt? (HELO, MAIL FROM:, RCPT TO:, DATA) At which step, in the SMTP protocol, your email submission fails? – Tonin Sep 5 '12 at 14:55

Know someone who can answer? Share a link to this question via email, Google+, Twitter, or Facebook.

Your Answer

 
discard

By posting your answer, you agree to the privacy policy and terms of service.

Browse other questions tagged or ask your own question.