Hello,
I have a question regarding DNSBL usage with the main.cf
smtpd_client_restrictions parameter.
I have a server configured to check SpamHaus:
main.cf
. . .
smtpd_client_restrictions = reject_rbl_client
zen.spamhaus.org=127.0.0.[2..11],
. . .
This has been working very well, although I noticed the following error in my
syslog:
Sep 7 16:13:08 server postfix/smtpd[28363]: warning:
188.50.102.94.zen.spamhaus.org: RBL lookup error: Host or domain name not
found. Name service error for name=188.50.102.94.zen.spamhaus.org type=A: Host
not found, try again
I am wondering - in normal checks against SpamHaus, if a host is not listed and
the result is NXDOMAIN, I am assuming that Postfix interprets that the host is
“ok” and does not log any information. In this case, though, it has logged the
information and I am wondering if this is because Postfix was unable to contact
SpamHaus at all, not just regarding the record: 188.50.102.94.zen.spamhaus.org ?
Thanks,
- J
