On 2008-02-24 at 14:43 -0500, ocl discussins wrote:
> Is there is a way to implement RBL/DNSBL lookups with Exim and instead of
> rejecting a message, simply appending something to the subject line? Of if
> that isn't possible, to tag the header? Or even both?
Yes; I never mess with the Subject: though and I advise against doing
so; especially since, with the move to DKIM(/DomainKeys), messages are
getting cryptographically signed with the signature covering some
headers. The Subject: will typically be one of the signed headers, so
it's a bad idea to mess with it.
I use this to add a new header to the message; it's a clause in my RCPT
ACL which comes just before the accepting of mail for local domains:
warn condition = ${if isip4{$sender_host_address}}
!authenticated = *
!hosts = +relay_from_hosts
domains = +local_domains
verify = recipient
dnslists = zen.spamhaus.org : \
dnsbl.njabl.org : \
relays.nether.net : \
bl.spamcop.net : \
bl.spamcannibal.org
add_header = X-RBL-Blacklist: $dnslist_domain ($dnslist_text)
logwrite = Sender host [$sender_host_address] on \
RBL $dnslist_domain: $dnslist_text
-Phil
