On 15.09.2016 05:11, Indunil Jayasooriya wrote: > I want to know if amavisd-new can bock mails based on Message-ID:, > when it has a particular PATTERN?
If by "block" you mean "reject before the message is received", I think you're looking in the wrong place. Like many others, I use a combination of Postfix, Amavisd-new, virus checkers and SpamAssassin. To prevent messages with particular IDs ever entering my systems, I'd use a header check in Postfix. Given your own example, this should work: # pcre:/etc/postfix/header_checks /^Message-ID:.+PC-EXC02.Fanex-us.local$/ REJECT As an alternative, you can let the message enter your system and use a SpamAssassin rule to increase the spam score. -Ralph