Kill Verisign Routes :: A Dynamic BGP solution
Damian Gerow
damian at sentex.net
Thu Sep 18 22:58:13 UTC 2003
Thus spake Stephen J. Wilcox (steve at telecomplete.co.uk) [18/09/03 18:54]:
> So totallymadeupdomain.com now resolves but is unreachable. That will prevent
> you from bouncing emails to non-existent domains immediately..
FWIW, the latest versions of postfix have code in them to block connects
from explicitly listed hosts:
New check_{helo,sender,recipient}_{ns,mx}_access maptype:mapname
restriction that applies the specified access table to the NS or
MX hosts of the host/domain given in HELO, EHLO, MAIL FROM or RCPT
TO commands.
This can be used to block mail from so-called spammer havens, or
from sender addresses that resolve to Verisign's wild-card mail
responder, currently at IP address 64.94.110.11.
- Damian
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