[Mailman-Developers] LTMP for incoming mail

[Ian Eiloart]

--On 28 September 2006 08:21:05 -0500 Brad Knowles 
<brad at stop.mail-abuse.org> wrote:

>
>>  What I find really intriguing about this approach is the ability to
>>  reject some messages immediately, presumably allowing the MTA to
>>  bounce them.
>
> Yup.
>
>>                We could reject the message then before it entered
>>  Mailman's incoming queue.
>
> Indeed, that's a key advantage.  IIRC, procmail does this with the
> system-wide and user-defined rulesets.

If that's a reason for using LMTP, then I'd prefer SMTP. Exim can call 
forward to an SMTP server to see if it will accept a message before it's 
too late to reject it at SMTP time. I don't think it can do that with LMTP, 
though I may be wrong.

So, with SMTP if Mailman were to reject a sender to a list, my MTA could 
reject it without causing a bounce.

-- 
Ian Eiloart
IT Services, University of Sussex