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:
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: