Block incoming emails from perfora.net domain

Configure Postfix to reject all emails from perfora.net by adding
header_checks rules that inspect both From and Received headers.
Implementation includes:

1. Adding header_checks configuration to Postfix
2. Creating a regexp file with rules to block the domain
3. Setting up an activation script to ensure proper file linking

This change helps prevent unwanted messages from this specific domain
while maintaining normal mail service for all other senders.

0 files changed, 0 insertions, 0 deletions