RH 7.3/sendmail-8.11.6-27.73/ build sendmail.cf with m4
Ok - I haven't used sendmail in quite a while, so my answers may be off-track.
Two possibilities emerge:
-> Is there some sort of transparent NAT happening before the mail reaches your MX? E.g. The external client connects to a public IP on a box that NATs it to an private IP on which your MX runs? If that is the case, then the IP that would be checked against the DNSBLs would be the internal IP of your NAT box.
-> Have you tested your setup by following instructions at:
http://www.spamhaus.org/sbl/howtouse.html
Follow the instruction under the "Testing your SBL Setup" section.
Mail me the complete headers of a recieved spam mail off-list.
even rDNS does not work !!
What do you want to here - reject mails from clients with an un-resolvable address or reject mails which contain un-resolvable domains in their envelope address?
If the former, then look at the following link:
http://www.sendmail.org/~ca/email/chk-810.html#810MISCCHECK
If the latter, then do what George has said.
<snip>
-- Regards, Varun Varma --------------------------------------- Mindframe Software & Services Pvt. Ltd. http://www.mindsw.com ---------------------------------------
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