Philip,
thank you for your time and explanation.
Our new mail server was setup by an ISP and presented as working and I get
the job of maintaining it, so I'm still figuring out what actually happens.
av_scanner: is Exiscan, it calls a script that runs incoming mail through
multiple av scanners, the theory being that one of them should have the
latest signatures.
Not knowing what etrn is I cannot explain, but I will find out.
Graham
> -----Ursprungliche Nachricht-----
> Von: Philip Hazel [mailto:ph10@cus.cam.ac.uk]
> Gesendet: Samstag, 6. September 2003 22:02
> An: Graham Dodd
> Cc: exim users
> Betreff: Re: [Exim] ACL's, Routers and Transports
>
>
> On Fri, 5 Sep 2003, Graham Dodd wrote:
>
> > Newbie back again for some clarification, I'm just trying to
> understand the
> > order that events take place and my exim.conf is full of $%"*.
> >
> > MUA or MTA knock on door 25 and says EHLO
> >
> > acl_smtp_connect is run, if ok then MAIL command received
> > acl_smtp_mail is run, if ok then RCPT command received
> > acl_smtp_rcpt is run, if ok then DATA command received
> > acl_smtp_data is run, if ok then mail is received by Exim.
>
> Correct. This is the end of an Exim "reception process". The message has
> been written to Exim's spool area.
>
> This is point X (see below).
>
> Some time later (may be immediately following, but does not need to be),
> in a separate process:
>
> > Received mail is processed by the routers, router determines
> which transport
> > to use, transport delivers message (either local or remote)
>
> TransportS (plural) maybe, if there is more than one recipient.
>
> > In my .conf I have
> >
> > acl_smtp_rcpt = check_rcpt
> > acl_smtp_data = check_data
> > acl_smtp_etrn = check_etrn
> >
> > av_scanner = cmdline:/etc/exim/scanner.sh %s:INFECTED:(.+)
> >
> > does this mean that the scanner.sh is called after
> acl_smtp_etrn has run ?
>
> I don't understand this. ETRN has nothing to do with receiving messages,
> and av_scanner isn't a standard Exim option.
>
> > At which point in this process does system_filter get run ? The
> books states
> > "runs right at the start of delivery, before the recipient addresses are
> > routed", but which part of this process is classed as "start of
> delivery"
>
> At "point X" above, which is at the start of the delivery process. If it
> takes several tries to deliver a message, the system filter is run
> several times, at the start of each delivery attempt.
>
>
> --
> 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
>
>
