In my Exim ACL_SMTP_MAIL handler (acl_check_mail) I
have the following warnings set to write to the reject.log,
and get sensible results for many SMTP connections but
for some servers the results seem incorrect:
warn message = X-Greylist: listed no reverse record.
logwrite = :reject: H=$sender_fullhost: no reverse record.
!verify = reverse_host_lookup
warn message = X-Greylist: listed invalid HELO.
logwrite = :reject: H=$sender_fullhost: invalid HELO.
!verify = helo
These lines appear in the reject log
(date/time prefix removed to shorten line length):
H=mail.mkcontacts.com [63.65.43.137]: no reverse record.
H=mail.mkcontacts.com [63.65.43.137]: invalid HELO.
H=n10a.bulk.scd.yahoo.com [66.94.237.44]: listed no reverse record.
H=n10a.bulk.scd.yahoo.com [66.94.237.44]: listed invalid HELO.
Will someone please point out my syntax error or misunderstanding?
$ nslookup 66.94.237.44
Name: n10a.bulk.scd.yahoo.
Address: 66.94.237.44
$ nslookup 63.65.43.137
Name: mail.mkcontacts.com
Address: 63.65.43.137
The reverse requests clearly work and the names match as
evidenced by both lookups (later) and the syntax of the
$sender_host_name which did NOT print the HELO string
in parentheses (to indicate the two names matched.)
#These lines appear in the initial main section of the
#exim configuration file:
helo_lookup_domains = *
helo_try_verify_hosts = *
host_lookup = !127.0.0.1/8 : *
--
Herb Martin
