[65531] in North American Network Operators' Group
Re: incorrect spam setups cause spool messes on forwarders
daemon@ATHENA.MIT.EDU (Michael Lewinski)
Mon Dec 1 14:56:59 2003
In-Reply-To: <E1AQsVP-0001Oi-MY@ran.psg.com>
From: Michael Lewinski <mike@rockynet.com>
Date: Mon, 1 Dec 2003 12:52:28 -0700
To: nanog@merit.edu
Errors-To: owner-nanog-outgoing@merit.edu
On Dec 1, 2003, at 11:10 AM, Randy Bush wrote:
>
> is the following a general problem, or just one i am seeing?
>
> note 2821 says
>
> 450 Requested mail action not taken: mailbox unavailable
> (e.g., mailbox busy)
> 550 Requested action not taken: mailbox unavailable
> (e.g., mailbox not found, no access, or command rejected
> for policy reasons)
>
FWIW, there are now fake smtp tarpits out there that behave this way
(4xx deferrals of suspected spam).
http://www.benzedrine.cx/relaydb.html
The idea is to "punish" spammers by filling up their queues, although
honestly I don't know of any spammers who actually *have* queues. They
just borrow other people's of course. I'm not sold on the wisdom of
this course.
