On 3/31/2012 8:16 AM, Tilman Schmidt wrote:
Am 31.03.2012 13:36, schrieb Jonathan Vomacka:
On 3/31/2012 7:11 AM, Prabhpal S. Mavi wrote:
But when i telnet 587, i can see 220 in response. [root@jet postfix]# telnet localhost 587 Trying ::1... Connected to localhost. Escape character is '^]'. 220 mail.digital-infotech.com ESMTP Postfix (2.6.6)
But when i telnet to 465, i do not see 220 in response. is it normal? [root@jet postfix]# telnet localhost 465 Trying ::1... Connected to localhost. Escape character is '^]'.
Expected behaviour. Bear in mind that 465 is the old deprecated SMTPS (SMTP over SSL) port which just runs SMTP over an SSL session. Postfix cannot send a greeting on that port without completing the SSL handshake first, but Telnet doesn't speak SSL. So Postfix is just waiting in vain for the SSL handshake.
I thought port 465 SSL was deprecated
Correct.
and replaced with port 587 TLS?
Not quite. It's replaced with STARTTLS which works over port 25 (SMTP) as well as 587 (MSP).
HTH T. _______________________________________________ CentOS mailing list CentOS@centos.org http://lists.centos.org/mailman/listinfo/centos
Tilman,
Thanks for the correction. I wanted the mailing list to be aware that smtps (465) is deprecated and replaced with (as you said) SMARTTLS. Anyone creating a brand new mail server should use this method.