Here at ProgClub, as moderator for our mailing lists, I get a bunch of spam that I have to get rid of every day, to keep our lists sparkling and spam-free. I regularly get spam from senders from ofenews.co.uk, and I wanted to add their entire domain to a blacklist on our mail server… I hadn’t configured a Postfix blacklist before, so I did a little research and came up with this:

I created a file /etc/postfix/sender_access like this:

ofenews.co.uk REJECT

Then I created the access database:

# postmap /etc/postfix/sender_access

Then I added the sender restrictions into /etc/postfix/main.cf:

smtpd_sender_restrictions =
  check_sender_access hash:/etc/postfix/sender_access

Then I restarted postfix and was done! Everything is easy when you know how.

For reference, here is the doco which I read to help me:

• check_sender_access
• access – Postfix SMTP server access table
• Postfix blacklist or reject an email address