Tech Blog Checking the availability of SMTPS, POPS and IMAPS.
April 13th, 2006Open a linux shell execute the respective command; replace the hostname with the server IP/Hostname for which you want to check the avialability of secured mail ports.
POPS - port number 995 ->
# openssl s_client -connect hostname:995
SMTPS - port number 465 ->
# openssl s_client -connect hostname:465
IMAPS - port number 993 ->
# openssl s_client -connect hostname:995
Check out this link on more informaton about securing POP and IMAP.
http://www.linux-sec.net/Mail/secure_pop3.gwif.html
