Thanks a bunch, Sam.

BTW, what are the chances of getting in an enhancement to the 
DENIED_RBL_MATCH log messages that would include the name of the BL 
which matched? I'd really like to glean this from the logs on a regular 
basis, so I'd rather not increase the log verbosity. Something like:
DENIED_RBL_MATCH at: zen.spamhaus.org from: ...
What do you think?

Thanks again.
-- 
-Eric 'shubes'

On 03/11/2011 12:45 PM, Sam Clippinger wrote:
> Interesting... I think I understand what's happening.
>
> spamdyke is trying to find the MX record for bounce.e.groupon.com and
> receives an MX response that says "bounce-mx.exacttarget.com".  Then it
> tries to find an IP address for bounce-mx.exacttarget.com by searching
> for A or CNAME records.  Or rather, that's what it should do.  Due to an
> oversight on my part, it searches for A, CNAME and MX records because I
> was lazy and sent the same list of types to the function that tries to
> find the IP that was used to find the MX.
>
> As it happens, bounce-mx.exacttarget.com has both an A and a MX record
> associated with it, which is legal (but stupid).  When spamdyke receives
> the MX record it asked for but didn't expect, it assumes the remote
> nameserver is broken and stops with an error.  Due to a second oversight
> on my part, that error triggers the filter instead of failing gracefully.
>
> So, two bugs.  I'll get them fixed. :)  Thanks for reporting this!
>
> -- Sam Clippinger
>
> On 3/11/11 10:51 AM, Eric Shubert wrote:
>> I did a detail log, and captured one of these. It says:
>> ERROR: DNS response for bounce-mx.exacttarget.com: expected type A,
>> CNAME but received type MX
>> FILTER_SENDER_NO_MX domain: bounce.e.groupon.com
>>
>>    From the spamassassin host, I get:
>> [shubes@tacs-mail ~]$ host bounce-mx.exacttarget.com
>> bounce-mx.exacttarget.com has address 66.231.91.236
>> bounce-mx.exacttarget.com mail is handled by 10 bounce-mx.exacttarget.com.
>> [shubes@tacs-mail ~]$
>>
>> I don't see anything wrong here (but could be misunderstanding
>> something). Is spamdyke getting an MX record back before a type A (or
>> CNAME) record? Is a wildcard perhaps involved somehow?
>>
>> One other thing. I'm under the impression (from the dyndns.com site)
>> that MX records can (should?) not point to CNAME records. If this is
>> indeed true, then I would think that spamdyke shouldn't be looking for a
>> CNAME record which corresponds to the MX (as indicated in the message).
>>
>> As always, thanks Sam.
>>
>>


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