On 04/23/2014 06:46 PM, Unai Rodriguez wrote:
If our backup MX had issues forwarding to the main, will QMT show it on the logs? I'm guessing that there might be cases where it won't even show up.
Yes, in the smtp logs. Whenever any outside server attempts to send somethings to QMT, it will always show at least the connection attempt in the smtp logs. Something always shows up there, even if it's only the tcpserver messages. There are no cases where nothing shows up, unless the firewall is blocking for some reason, like fail2ban. There might also be a routing/filtering device of some sort between QMT and the perimeter which blocks traffic.
If there are no messages except those from tcpserver, that would be indicative of a problem with TLS ciphers of some sort. When there problems such as this, no log messages are issued (you can consider this a bug - I do). The easiest way to diagnose problems in this area is to utilize spamdyke's detail logging feature. See spamdyke documentation for how to do that. It's really pretty slick.
Thanks. -- -Eric 'shubes' --------------------------------------------------------------------- To unsubscribe, e-mail: [email protected] For additional commands, e-mail: [email protected]
