Question : SMTPSVC - DNS Problem

Hi all,

I've recently installed Exchange server 2003, and have the following message pop up in event viewer 5-6 times over the last day or so

event id 2012
SMTP could not connect to the DNS server 'xxx.xxx.xxx.xxx'. The protocol
used was 'UDP'. It may be down or inaccessible.

followed by event 2013

SMTP could not connect to any DNS server. Either none are configured, or all are down.

These event both relate to IIS 6.0, according to the more info button.

Now 'xxx.xxx.xxx.xxx' is the external DNS server for our ISP, and these settings are in place under default smtp virtual server.  All mail incoming & outcoming is fine, although some outgoing gets queued.

My question is what does this event message mean and how can I get rid of it ?  I've read somewhere that you have to change the meta data in IIS to use TCP, rather than UDP, as UPD can only handle certain number of packets.........If so how do I do this ?

Regards
Steven

Answer : SMTPSVC - DNS Problem

Hold the presses.  "Server failed" responses ARE returned to Exchange.  However, others aren't -- I just looked in the queue, and there are 3 messages queued for the "icinaz.co.cu" domain.  I then did an nslookup on that domain and received:

C:\>nslookup icinaz.co.cu
Server:  
Address:  10.230.48.200

Name:    icinaz.co.cu


C:\>

So even nslookup didn't give me much of a reply; I'm not sure what this means.  In most cases, the domains are for foreign countries, but I don't know if that's significant.