My server is crying with a spam problem. we are receiving a lot of
fake messages with virus attached. The messages coming from an account like [hidden email]@spammerdomain.com with content very similar
to the messages sent by our real contacts. How can i block that? im trying with amavisd-new and postgrey but dont work. maybe can i use some regexp?
Perhaps but we need more detail: is this address in the 'Envelope From' (sender) or in the 'From: header', and if the latter what is the full text of the header (i.e. so we can see if it is in the text part or in the <...> part)?