Is it possible to configure fetchmail to bounce straight back any message which does not have an address which is valid on my domain, and if so is it possible to tailor the bounce message.
And if it is possible how do you do it?????
I am having real trouble with spammers using a fictitious user name on my domain name as a return address. I haven't bounced wrong addresses before, as some of them are just mistakes, but I can't afford two or three hundred 'unknown, undeliverable' messages a day