On Tue, Sep 24, 2013 at 11:00:35PM +1000, Richard Kernahan wrote:
> Hi All,
> OpenSMTPd from the OpenBSD 5.3 i386 release is installed, and outgoing mail 
> is stuck in the queue, unable to find the MX server to relay to. What I find 
> confusing is that some emails have been relayed (after some delay).
> 
> tcpdump reports that smtpd is sending 3 UDP messages to the name server, but 
> when the reply arrives for the first request, an ICMP port unreachable 
> message is returned, indicating the first port is unreachable.
> I suspected pf (I always suspect pf :-) but when using dig, we see the MX 
> query and the UDP reply is accepted. The difference I see is that dig sends 
> only one request instead of 3.
> In both cases (smtpd and dig) `systat states` shows the UDP states.
> It *looks* like smtpd is no longer listening for a response on the first 
> request's port. I don't see a response to the second and third requests.
> 
> Does anything in the following configuration appear wrong or questionable?
> Does smtpd making 3 DNS requests seem reasonable? What might cause it to stop 
> listening for a response?
> 

Sorry for the delay, I forgot about your mail :-)

Does it still happen if you add domain to the tcpserv macro in your pf.conf ?

-- 
Gilles Chehade

https://www.poolp.org                                          @poolpOrg

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