SELinux is already disabled.
I tried doing a manual test by telnetting to the remote server on port 25
and putting the commands in manually to send a message, and it was accepted
for delivery. Something is amiss with the Exim config or some other
interdependency. The IPTables config and anything Amazon might have
configured are out of the picture now that I've verified the box can send
mail manually. My IPTables config doesn't have anything user restricted
either.
Any other ideas?
-----Original Message-----
From: Chris Siebenmann [
mailto:cks@cs.toronto.edu]
Sent: Thursday, June 06, 2013 8:22 AM
To: Don O'Neil
Cc: exim-users@???
Subject: Re: [exim] remote_smtp defer (110): Connection timed out on AWS EC2
Instance
| I have a new Centos 6.1 server on AWS EC2 w/ Exim 4.8.1 that I just
| set up that won't send messages. Everything seems to be configured
| correctly, but then I get the following messages in the log when I try to
send anything:
|
| 2013-06-06 01:30:02 1UkGQN-0002ok-5C mta5.am0.yahoodns.net
| [98.136.216.25] Connection timed out
[...]
| I've disabled the firewall, made sure DNS resolves correctly, made
| sure Amazon has lifted the SMTP limitations, made sure that the IP
| isn't on any black lists, and that reverse DNS is correct. The HELO
| string in the config file is correct and I can telnet the remote SMTP
| servers on port 25 and am connected ok;
|
| # telnet mta5.am0.yahoodns.net 25
| Trying 98.136.216.25...
| Connected to mta5.am0.yahoodns.net.
| Escape character is '^]'.
| 220 mta1148.mail.gq1.yahoo.com ESMTP YSmtpProxy service ready
Any time there are mysterious failures in a daemon where things work from
the command line on a Linux machine, I suspect SELinux. Do you happen to
have SELinux enabled? If so, is it logging anything that you can see?
SELinux logs go to /var/log/audit/* instead of to syslog, if I remember
right.
If this is SELinux you have two options: wrestling SELinux into shape in
various ways or turning it off entirely. Turning it off entirely is common,
although it makes the SELinux people sad and unhappy.
- cks
