[77709] in North American Network Operators' Group
Re: Time to check the rate limits on your mail servers
daemon@ATHENA.MIT.EDU (Raymond Dijkxhoorn)
Thu Feb 3 10:06:10 2005
Date: Thu, 3 Feb 2005 16:05:09 +0100 (CET)
From: Raymond Dijkxhoorn <raymond@prolocation.net>
To: Nils Ketelsen <nils.ketelsen@kuehne-nagel.com>
Cc: nanog@merit.edu
In-Reply-To: <20050203095400.A28735@torzimon.ca.int.kn>
Errors-To: owner-nanog-outgoing@merit.edu
Hi!
>> 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.
Start using authenticated SMTP for this.
Bye,
Raymond.
