Thomas Jacob wrote: >> After a quick look at the source, I think I can say that the default >> query is all done with a single TXT query. There is no separate query to >> see if it exists and then another to check the TXT record. > > Hmm, maybe I am reading this wrongly (exim 4.67), but isn't > > verify.c:2798 if (dns_basic_lookup(&dnsa, query, T_TXT) == DNS_SUCCEED) > > only executed if the DNS request for the dnsbl succeeded: > > verify.c:2672 if (cb->rc == DNS_SUCCEED)
Well since the first query for a dnslists type condition seems to be cb->rc = dns_basic_lookup(&dnsa, query, T_A); instead of the default T_TXT for the 2 other dns resolvers in there, I guess it might not get returned the first time. /* If there is no alternate domain, look up a TXT record in the main domain if it has not previously been cached. */ I guess you're in luck if it's been cached lately! The dnslists condition doesn't have the features of the dnsdb lookup which I actually meant to point you to. http://www.exim.org/exim-html-current/doc/html/spec_html/ch09.html#SECTdnsdb A mere 31 chapter difference >> You can heavily modify the behavior of the resolver as laid out in the >> manual. >> >> http://www.exim.org/exim-html-current/doc/html/spec_html/ch40.html#SECTmorednslists > > I read that, but as far as I can see, this only allows one to specify > what TXT record lookup will done, it doesn't say anything about > preventing > this lookup altogether... Use a ${lookup dnsdb{a=$sender_host_address}{yes}{no}} style query instead of a dnslists one. I'm sure this will require additional playing around as you'll have to do a match and/or condition to get it to work the same way as the dnslists. -- The Exim Manual http://www.exim.org/docs.html http://www.exim.org/exim-html-current/doc/html/spec_html/index.html -- ## List details at http://lists.exim.org/mailman/listinfo/exim-users ## Exim details at http://www.exim.org/ ## Please use the Wiki with this list - http://wiki.exim.org/
