Adventures In Tech

Seeing as how many of the big ISPs block attempts to connect to port 25 on any servers but their own, those of you running Postfix for remote users will probably want to accept connections on an alternate port. All that’s needed is to add the following line to /etc/postfix/master.cf:

8025 inet n - n - - smtpd


Of course, you can choose any available port on your system that you would like to accept connections on.

Wasn’t sure why I wasn’t receiving test emails I sent to both abuse@ and postmaster@ for one of the domains that I have setup with Google apps. I thought having the catch-all turned on would allow me to receive these. Turns out that the kind people at Google monitor these two addresses for our convenience. You can also see what is sent to them but you will need to create an email list and add the desired recipients.

1. Log into your Google apps account.
2. Go to Service Settings -> Mail.
3. Click on the ‘Email addresses’ tab.
4. Click on ‘Create an email list’ and setup lists for abuse and postmaster.