On 09/17/2014 02:35 PM, Eric Broch wrote:
Hello list,
Can anyone tell me why, when I telnet to one of my email servers over
port 25 that the SMTP greeting is starred (*) out, but if I telnet to
the same server over the submission port I get the standard greeting. As
follows:
# telnet host.domain.com 25
Trying 'host address'
Connected to 'host address'
Escape character is '^]'
220 *************************************************************
# telnet host.domain.com 587
Trying 'host address'
Connected to 'host address'
Escape character is '^]'
220 smtp server greeting
Looks to me like there is some other host that's receiving the port 25
traffic, like a firewall/proxy device of some sort, that's either
intercepting or altering the 220 reply. If you're not seeing any
tcpserver lines in the smtp log, then it'd be the former. If you do see
corresponding tcpserver log messages, then it'd be the later.
And, will this affect my SMTP email reception in any way?
I wouldn't think so. It would keep your server from being counted in
some polling that's done to see what kind of mail servers people are
using. It's for that reason that I encourage people to leave the "Qmail
Toaster Ver. 1.3" string in there. I probably should bump up that
version for the new packages. ;)
--
-Eric 'shubes'
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