I wonder if anyone has hared on a good way to do a conditional bounce. Basically, I want to be able to specify "from" blacklist email addresses, if any mail originating from the specified address arrives on a users email then it bounces the mail back. If an mail comes from any non specified list then it arrives fine.
So if a address is on the blacklist it can not email to a specific local email. The issue is I do not want to block it for the whole server but just if this address tries to reach a specific alias. If it does not work by Alias then I would also go with domain.
Any ideas, tips or advice would be very welcome.
I use RHEL + Sendmail + Spamassassin + ClamAV and Procmail