Tanguy Ortolo

Using address extension

Postfix (and many other mail servers) offers one nice address extension feature: addresses like <user+whaterver@> are implicit aliases to <user@>. This allows users to implement a simple measure to fight spam:

1. when SomeCompany® or whatever asks for your email address, give them <user+somecompany@>;
2. if you start receiving spam at that address, you know who sold or was stolen your address;
3. finally, you will be able to disable that address so messages are simply refused with a permanent error code.

Read more Disable your spammed addresses with Postfix