Hello. I have been troubleshooting an email delivery issue with my CentOS 5.x server. All of my virtual servers are using Google Apps for email so I never really took notice if the local mail delivery was working or not. But recently a client mentioned that email was not getting delivered from her website to external contacts.
The users site is using php mail() function which is using sendmail/postfix. After a bunch of troubleshooting I tracked the issue down to Postfix not routing the mails for some reason. The emails are just sitting in the maildrop folder. This is where I’m stuck because I havent touched the postfix configuration since initial install. Also I cant seem to find any logs for Postfix. I believe they should be in /var/log/mail.log but I dont see that, only /var/log/maillog which seems to be only for sendmail - but there is nothing relevant in that log anyway.
Also worth noting is that I dont have “mail for domains” enabled on any of the domains except the “admin/system” domain since the MX records for all the client domains are using Google Apps. I think this is likely part of the issue… But where to look next?
Thanks for any help!