Hi! On Mon, Jun 17, 2002 at 07:23:55PM +0200, Maurits van de Kamp wrote: > Definitely not, since it's only the source IP address that > counts! The from-address can be anything, and in fact I don't > know any ISP smtp server that checks this. It's easy for a > spammer to enter a From-address that complies with the domain > the smtp server is in. Of course, but I didn't say an SMTP server should rely on the MAIL FROM only, did I? I said it shouldn't allow both MAIL FROM and RCPT TO to be external addresses even for local clients. > From-addresses don't mean a thing, especially not in spam > tracking. Not in tracking, but it defines the return path of bounces. > As we speak, a spam attack on my own mailserver is in progress > without any success. Someone from Chello.nl has been trying to > relay mails over smtp.bassment.nu using the from-address of one > of my customers for the last 20 days. Fortunately, the server > plays by my rules and not yours or he would have succeeded. :) It seems you didn't get my point. My rules are actually more strict than yours. I said that even for local clients at least one address should be local. For non-local IP addresses, only external to internal delivery is allowed, of course. Ciao Thomas -- Thomas Binder (Gryf @ IRCNet) gryf@hrzpub.tu-darmstadt.de PGP-key available on request! Vote against SPAM: http://www.politik-digital.de/spam/
Attachment:
pgp6UBi8JQtMK.pgp
Description: PGP signature