Author: W B Hacker Date: To: exim users Subject: Re: [exim] ACL, transport, & SpamAssassin
Antonio Leding wrote: > Hi Heiko,
>
> Thanks very much for this information - so two more questions for you and the community:
>
> 1) It seems that ACL is faster when compared to TRANSP?ORT - is this true?
It isn't about 'faster'. SA takes orders of magnitude more time than
wotever Exim is doing.
It is about 'sooner'.
The ACL entry takes place DURING the smtp session, and can be used to
convey some portion of 'why' spam score back to the
currently-still-connected submitter if one is rejecting.
No need for a later 'DSN'. No risk of being abused for 'backscatter' spam.
Routers and their transports operate on messages already in the queue.
The session that placed them there is 'gone'.
Any post-session rejection wants generation of a DSN. That bounce MAY be
going to a bystander, not the actual spambot. See 'backscatter'
>
> 2) Is Exim planning on removing the ability to perform the TRANSPORT type of operation?
>
NFW. A 'transport' is wot makes a delivery. ANY kind of 'delivery' one
chooses.
Exim is a Message TRANSFER Agent. Not a collector or hoarder.
