How to configure an SMTP Black Hole

Requirement:  Build a web server that will receive email for a particular domain and discard it immediately (and silently).

I started with a canned Debian 9 system at OVH, but this should work with other and older Debian versions too.

Log in as root and make sure you’re all up to date:

Set your hostname.

Install postfix

Now we can configure aliases and postfix.

Now watch the mail log and see everthing addressed to @fakemail.ca go to /dev/null

Example log entries for an email going to /dev/null:

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