[ILUG] Postfix problems with spamhaus blacklists

[Niall O Broin]

On Thursday 22 April 2004, philip.reynolds at rfc-networks.ie (Philip
Reynolds) wrote:

>Niall O Broin <niall at linux.ie> 26 lines of wisdom included:
>> Apr 17 00:41:31 pogo1 postfix/smtpd[26325]: warning:        \ 
>> 230.192.141.69.sbl-xbl.spamhaus.org: RBL lookup error:      \
>> Name service error for 230.192.141.69.sbl-xbl.spamhaus.org: \
>> Host not found, try again
>> 
>> 
>> Now surely in the normal course of event, this is (hopefully) what
you'll see 
>> more of i.e. failed lookups because the host is NOT in the list. So,
why is 
>> that being reported? Also, in the current logs I am seeing NO RBL
rejected 
>> messages. I suppose it's possible that the spammers have stopped
sending mail 
>> to this server, but I doubt it, somehow.
>
>No, the lookup failed because the DNS server was unreachable; "Name
>service error for"
>
>Can you reach the spamhaus RBL manually? I personally don't use
>spamhaus, so I can't comment on whether it's working or not. It
>should be easy to troubleshoot that by hand though.

That's the puzzling part - dig, host et al. on the mail server have no
problems resolving thses names.


Niall