On Thu, 29 May 2003, Alan J. Flavell wrote:
> Would it be possible to have an ACL entry with two dnslists clauses in
> it? - like
>
> deny dnslists = ! rbl-plus.mail-abuse.ja.net=127.1.0.2
> dnslists = rbl-plus.mail-abuse.ja.net
I think the answer has probably already been posted, but, for the
record:
You can always repeat any condition in an ACL. They are processed in
order, and this provides an "and" facility. Thus:
deny dnslists = a.b.c
dnslists = d.e.f
means "deny if in the a.b.c list AND in the d.e.f list".
You can also have multiple ACL verbs, and this provides an "or" facilty.
Thus:
deny dnslists = a.b.c
deny dnslists = d.e.f
means "deny if in the a.b.c list OR in the d.e.f list".
Of course, in this case, you can also get the OR feature by multiple
entries:
deny dnslists = a.b.c : d.e.f
but you can't do that when the two conditions are not the same or don't
take a list. For example:
deny dnslists = a.b.c
hosts = x.y.z
compared to
deny dnslists = a.b.c
deny hosts = x.y.z
The first is an "AND" and the second is an "OR".
--
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
