On 04-Jul-2000, Markus Stumpf wrote:
> we have the problem that we receive a lot of spam with sender addresses
> e.g. @hotmail.com but the mail is relayed via open relay mailservers
> (not on e.g. mail-abuse RBL).
You might want to look at MAPS RSS and MAPS DUL too. We use
RBL+RSS+DUL.
> I think it would not be too hard to hack qmail-smtpd to check for the
> existance of e.g.
> /var/qmail/control/knownsmpt/hotmail.com
> in case the sender domain is hotmail.com, read from the file a list
> of IP addresses and accept the mail, if TCPREMOTEIP is on the list
> or deny it otherwise (hard or temporary, one's milleage may vary).
> Has anyone done something like that?
See the tcpserver man page at http://cr.yp.to/ucspi-tcp/tcpserver.html
for -x option. It does the checking to everyone though, regardless of
the sender domain.
Ronny
