Re: [Exim] SMTP Protocol Violation and "Big Brother"

Top Page
Delete this message
Reply to this message
Author: Philip Hazel
Date:  
To: Mills Mr C P
CC: 'exim-users@exim.org', Winter Mr G, Bahia Mr. HS
Subject: Re: [Exim] SMTP Protocol Violation and "Big Brother"
On Thu, 9 Oct 2003, Mills Mr C P wrote:

> It seems Big Brother connects and does not wait for the banner before it
> sends a QUIT which is clearly upsetting Exim.


That is a violation of the SMTP protocol. Exim was tightened up to
detect this as a result of somebody pointing out that this was one case
it missed.

> I have read on the Exim lists
> that this is a feature designed to block certain types of badly behaved spam
> engines. Question is, can this test be disabled for certain hosts somehow? I
> agree that it is a useful feature, but it is making our SLA stats look
> bad!!!!


smtp_enforce_sync

--
Philip Hazel            University of Cambridge Computing Service,
ph10@???      Cambridge, England. Phone: +44 1223 334714.
Get the Exim 4 book:    http://www.uit.co.uk/exim-book