Changing the outgoing SMTP (sending) IP address in Postfix

This is far easier than I thought it’d be. I had to change it to get around some blacklisting my primary IP obtained after an unfortunate spamming incident from a compromised user.

Just add the following to your postfix’s main.cf and restart Postfix:

  1. smtp_bind_address=1.2.3.4

Where 1.2.3.4 is your new outgoing IP address.

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