I have a user that uses address extensions quite a lot. one extension she uses has become nothing but spam since her (cancelled) credit card shared the address with advertisers.
She would like to have mail to user+vis...@domain.tld rejected while not affecting an mail to u...@domain.tld or user+anyth...@domain.tld. My initial idea was in sender_access.pcre add a line: /^user\+visa89@domain\.tld$/ 550 No Such User but when I tried that and sent a test message (to a test account) the message came right through.
