On Fri, 2006-01-06 at 12:01 +0000, Gordon Burgess-Parker wrote:
On Fri, 2006-01-06 at 11:03 +0100, Erik Slagter wrote:On Thu, 2006-01-05 at 21:51 +0000, Gordon Burgess-Parker wrote:Is there a way of setting up a message filter that says "if the sender is not in my address book then delete it"?If possible you'd better implement this at the mail server, so the sender knows it's message has been discarded. Using postfix this is really easy.but I don't WANT the sender to know, as that would tell spammers they have a valid email address!
Does not need to be that way. If you make the mailer return something like "554 Unsollicited email" it can't know. If you're really paranoid, make it return "554 User unknown", although that's not really polite. Don't worry, spammers actually don't process the return codes of the mailer at all. Any mail sent from a legitimate address by a real mailer will get a nice non-delivery-notification though. This is something completely else than sending a bounce message from your mailer (MTA, not MUA), or mail to the "unsubscribe" address, which no sane person should do.
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