Hello,
We have a problem in SMTP communication with some external mailservers.
I will explain.
If i do a telnet to port 25 on a remote server, I get no greeting
message, it just waits. I suppose this is some greeting delay for anti spam.
But the greeting never comes. But if i press a carriage return, the
greeting comes after a while.
Can someone explain this ?
Show below :
--------
telnet mx.ujf.cas.cz 25
Trying 147.231.100.6...
Connected to mx.ujf.cas.cz (147.231.100.6).
Escape character is '^]'.
554 mx.ujf.cas.cz ESMTP not accepting messages
500 5.5.1 Command unrecognized: ""
500 5.5.1 Command unrecognized: ""
500 5.5.1 Command unrecognized: ""
--------
This is after a carriage return... But even the greeting does not show.
Does anyone has a clue in wich direction i have to look ?
Our mailservers use postfix, the remote is different each time. The
message in the logfile is : (another server)
------
(conversation with mailhost.iist.unu.edu[202.175.118.196] timed out
while receiving the initial server greeting)
------
Greetings .. Richard Smits
