> 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)
?
> 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...
