On Fri, Jan 11, 2008 at 04:25:45PM -0600, Marc Skinner wrote:
> -----BEGIN PGP SIGNED MESSAGE-----
> Hash: SHA1
>
> most SMTP serves do a reverse DNS check on incoming SMTP servers. so if
> your server is going out an ip address that doesn't have its RDNS set to
> mail.buffalo.k12.mn.us - i would guess that might be a good place to
> start. it is supposed to cut down on spam, in reality, i think it just
> cuts down email being set out from mis-configured email servers.
On the e-mail servers that I admin, I get 55-60% connections from
servers without reverse DNS. 99% of those connections are delivering
SPAM. This data is from December 2007.
Cheers,
florin
--
Bruce Schneier expects the Spanish Inquisition.
http://geekz.co.uk/schneierfacts/fact/163
-------------- next part --------------
A non-text attachment was scrubbed...
Name: not available
Type: application/pgp-signature
Size: 189 bytes
Desc: not available
Url : http://mailman.mn-linux.org/pipermail/tclug-list/attachments/20080112/bc5a4e6d/attachment.pgp