Re: SMTP - Connection to DNS

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From: Patrick Genova [MSFT] (pgenova_at_online.microsoft.com)
Date: 05/12/04 

Date: Wed, 12 May 2004 08:02:06 -0400

Hi Steven,

I doubt that disabling UDP will get rid of the issue. If the ISP DNS is
unable to process the UDP you would not be able to send mail. I still
suggest to remove the ISP DNS settings from the SMTP Virtual Server and
point the Server to your internal DNS Server and let this Server handle the
queries. 

-- 
Patrick Genova
Pgenova@online.microsoft.com
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"StevieD" <anonymous@discussions.microsoft.com> wrote in message 
news:35FEB5C7-C784-4104-82CF-B15AA4AE6DF9@microsoft.com...
> 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 events 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.
>
> 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
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