Dave Buchanan (Abo Ltd) wrote, at 11/03/2008 10:32 AM: > Dear postfix users > > I have re-configured our postfix mailservers to remove catch all aliases to > remove the ammount of mail accepted. > > I know have one more issue to resolve with respect to non delivery > notifications - backscatter > > the setup is as follows > > [EMAIL PROTECTED] -> [EMAIL PROTECTED] (demon.net is an uk isp) > > This is what happens to an e-mail that has spam / virus etc from > > Mail is accepted by our servers for delivery and then passed on to [EMAIL > PROTECTED] > The demon.net mailserver rejects this mail with a 550 error > our mailserver then sends a non-delivery notification to the sender > > If the sender has been dreamed up by the spammer etc then they receive > unwanted mail > > I would like to know how to turn these non-delivery e-mails off in postfix
Forwarding is a particularly sticky issue, because it was once a relatively useful feature. These days it's a lot more trouble than it's worth, so avoid it whenever possible. If you can't do that, then you need to improve your own antispam defenses so your server is the one rejecting the message during the SMTP session. This will have more benefits in the long run than trying to selectively disable bounce notifications. The rule of thumb is to try not to accept messages that can't/won't ultimately be delivered. Also keep in mind that there are alternatives to forwarding. There are many client side solutions that enable you to automatically move mail from one account to another.
