[69157] in North American Network Operators' Group
Re: disabling SMTP
daemon@ATHENA.MIT.EDU (David A.Ulevitch)
Sun Mar 28 12:36:51 2004
In-Reply-To: <406700D9.4050704@ehsco.com>
From: David A.Ulevitch <davidu@everydns.net>
Date: Sun, 28 Mar 2004 11:36:10 -0600
To: nanog@merit.edu
Errors-To: owner-nanog-outgoing@merit.edu
On Mar 28, 2004, at 10:44 AM, Eric A. Hall wrote:
>
> To be more realistic (and to close-in on any 'proposal' which might
> subsequently develop), it would likely be far more feasible to assign
> somewhat agressive negative weighting to sessions that use HELO (and
> further possible to assign mild positive weighting to sessions that use
> properly-formed EHLO), such as for use with session-wide rejects.
This solution might work/help for what, maybe a week?
Spammers are scum but they aren't dumb.
I would imagine that posting this technique to NANOG just made it
totally worthless. Look for malware to start being ESMTP compliant in
a few hours, days or maybe a week if the spammers are too busy laughing
at our complete and total collective failure at dealing with them
effectively to put down their pina colada's to code the fix.
Cynical? maybe. True? Sadly I think it is.
Thanks,
david ulevitch
