On Tue, 16 Jun 2015 22:02:29 +0200, you wrote: >Am Dienstag, den 16.06.2015, 11:44 -0400 schrieb Steve Matzura: >> The next phase of my testing procedure involves the simple act of >> delivering mail to my test box. When I send a message to either a >> valid or relayed user at my remote machine's address, it never gets >> there. I know this virtually for sure because I'm tailing >> /var/log/maillog and nothing new has been added for the past hour. >> I'm >> thinking eventually my ISP will send the message back to me as >> undeliverable, and in that bounced message there may be some >> information about why it was undeliverable, but maybe someone has a >> thought as to why I'm not even seeing anything attempt to connect? > >Receiving and Sending Mail is done by the MTA like postfix or exim. >Not Dovecot. It's just for the IMAP/POP access by the users to get the >mails. >So look at that logs. And if there's nothing in it, then make sure port >25 is actually open by the postfix/exim process.
Well, it isn't. In fact, there is no exim process running. However, something calling itself 'master' has port 25 open according to netstat, and that process has a subprocess running something called qmgr. I'd give more information, such as path to these programs, but it isn't shown. Time to check my Postfix config a little more closely.
