Old 30th September 2009, 22:55
tuananh87vn tuananh87vn is offline
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Default enable smpts (port 465)

I'm following the howto of installing postfix on debian and have nearly reached the end. At the moment, i can receive email using pop3/pop3s/imap/imaps and send mail using only smpt. I run a nmap and notice that port 110, 995, 143, 993 and 25 were open, but there's no open port 465 needed for smpts.

How was that, is port 465 intended to open in the howto? or how to open that port so that i can send email securely using smpts.

thanks alot!
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Old 30th September 2009, 23:02
edge edge is offline
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This post might help.
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tuananh87vn (1st October 2009)
Old 1st October 2009, 06:21
tuananh87vn tuananh87vn is offline
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Originally Posted by edge View Post
ah yes, that's great. Thanks so much!

My mistake is that just uncommented the first line only:
#smtps    inet  n       -       -       -       -       smtpd
this makes postfix listen on port 465 yet that's not enough, i couldn't configure my email client to send email thru port 465 (encryption type is ssl)

only when the next line is removed comment
#  -o smtpd_tls_wrappermode=yes -o smtpd_sasl_auth_enable=yes
i can send message wrapped by ssl

by the way, if i just uncommend the first line, i could still send message under port 25 with tls. So what's the difference btw ssl and tls, can u explain it for me?

thank you edge, and you, falko, for your outstanding howto!

Last edited by tuananh87vn; 1st October 2009 at 06:28.
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