[77707] in North American Network Operators' Group
Re: Time to check the rate limits on your mail servers
daemon@ATHENA.MIT.EDU (Nils Ketelsen)
Thu Feb 3 09:58:52 2005
Date: Thu, 3 Feb 2005 09:54:00 -0500
From: Nils Ketelsen <nils.ketelsen@kuehne-nagel.com>
To: nanog@merit.edu
Mail-Followup-To: nanog@merit.edu
In-Reply-To: <bb0e440a050203041213c11704@mail.gmail.com>; from ops.lists@gmail.com on Thu, Feb 03, 2005 at 05:42:07PM +0530
Errors-To: owner-nanog-outgoing@merit.edu
On Thu, Feb 03, 2005 at 05:42:07PM +0530, Suresh Ramasubramanian wrote:
> One additional thing that I think wasnt mentioned in the article -
> Make sure your MXs (inbound servers) are separate from your outbound
> machines, and that the MX servers dont relay email for your dynamic IP
> netblock. Some other trojans do stuff like getting the ppp domain name
That, on the other hand, gets you into trouble with rather stupid Spam
filters, that only accept mails from a server, if that server is also
MX for the senders domain.
Yes, this is stupid, but that does not change the fact, that these
setups are out there.
Nils
