[82015] in North American Network Operators' Group
Re: OT? /dev/null 5.1.1 email
daemon@ATHENA.MIT.EDU (Simon Lyall)
Fri Jul 8 15:33:09 2005
Date: Wed, 6 Jul 2005 15:32:53 +1200 (NZST)
From: Simon Lyall <simon@darkmere.gen.nz>
To: nanog@nanog.org
In-Reply-To: <42CB4654.7060103@inoc.net>
Errors-To: owner-nanog@merit.edu
On Tue, 5 Jul 2005, Patrick Muldoon wrote:
> Even better if you can implement something that auto blacklists
> people that connect to your "secondary" MX's when you know that your
> primaries are up and accepting e-mail.
You might be able to connect to them but who knows what transient network
even might stop a remote site from connecting to your primaries long
enough that they try the secondary MX.
A related thing is that these days your mail system has to check the
validity of the address on SMTP connect time. I've used/seen a few email
setups where the front layer just checked the domain validity and the
layers further back checked the full address.
Doing that these days leaves you with a lot of email/spam to invalid
addresses you have to drop or bounce.
--
Simon J. Lyall. | Very Busy | Mail: simon@darkmere.gen.nz
"To stay awake all night adds a day to your life" - Stilgar | eMT.
