Lars Ellenberg schrieb:
/ 2004-10-21 15:04:20 +0200 \ Carlos E. R.:
The Thursday 2004-10-21 at 17:49 +1300, Volker Kuhlmann wrote:
but some nonsense address (please really use an invalid toplevel domain, not just a made-up address, which actually may exists!)
I've seen one mail server which dumps all mails with a non-existant From: domain to /dev/null without notification, and that's none too silly. You'll find out if your posts are blackholed. Just make sure the address you use doesn't exist.
The normal thing is to simply reject any email with non-existant "From" domain address. Time ago, SuSE distros configured sendmail that way; I haven't checked about postfix.
um. we still talk about the difference of Envelope and Header from? of course, non-existent _Envelope_ From should be rejected.
lge
O.K. nice discussion about that, but how we do get rid of this bots? A simple reauthentification, that you are homan, like on postfix-users list would help a lot. If you are a bot you can't answer the sign-up request. I inserted a reject-line in my mta but this does not help the others. I know it's hard to track back those bots. A worse solution would be to kill all signed up accounts not writing anything (which is no real solution). Philippe