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Re: How would you provide a 554 rejection notice for spam?
From: Rick Macdougall <rickm(at)ummm-beer.com>
Date: Tue Jul 31 2007 - 18:20:47 EDT
>
> okay, here's a sick idea:
>
> (1) MTA completes the SMTP exchange and responds with a 4xx after DATA
> finishes.
>
> (2) MTA passes message off to SA, then stores a hash of
> message-ID/score. MTA then discards the message.
>
> (3) When the remote MTA retries (if it retries) then the MTA looks up
> the score in the hash and decides whether to 200 or 5xx the message.
>
> All of the benefits of both methods! :)
>
Date: Tue Jul 31 2007 - 18:20:47 EDT
John D. Hardin wrote:
> On Tue, 31 Jul 2007, mouss wrote:
>
>> running SA at smtp time requires that the client does not timeout. >> so you'd better scan fast! you're also more subject to DOS (your >> smtp listeners are busy). compare this to queue and filter...
>
> okay, here's a sick idea:
>
> (1) MTA completes the SMTP exchange and responds with a 4xx after DATA
> finishes.
>
> (2) MTA passes message off to SA, then stores a hash of
> message-ID/score. MTA then discards the message.
>
> (3) When the remote MTA retries (if it retries) then the MTA looks up
> the score in the hash and decides whether to 200 or 5xx the message.
>
> All of the benefits of both methods! :)
>
Sort of like grey listing, which I do run on my personal domain, but I wouldn't use that method because of the inherent delay caused by the 4xx retry.
Neat idea though.
Regards,
Rick Received on Tue Jul 31 18:21:30 2007
This archive was generated by hypermail 2.1.8 : Mon Oct 22 2007 - 11:49:23 EDT
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