Re: Unable to bind to the destination server in DNS

Joe wrote:
> Not sure were to post this one, but I'll start in the DNS discussion.
>
> My gateway mail server (Win2k3 IIS6 SMTP) will stop delivering
> e-mails. The SMTP mail queue grows larger and acceptes inbound
> e-mails, but does not deliver internetbound e-mails. The Following
> Event (4000) is added to the Sytem event log.
> It makes sence - can find the mail server for the domain, cant
> deliver to it. However these events are spuradic and looking at my
> DNS cache, I se ethe domains listed. Any ideas?
>
> Event Type: Warning
> Event Source: smtpsvc
> Event Category: None
> Event ID: 4000
> Description:
> Message delivery to the remote domain 'hotmail.com' failed for the
> following reason: Unable to bind to the destination server in DNS.

Are you behind a Cisco PIX or simular firewall that blocks UDP packets over
512 bytes? (EDNS)

Either fix the firewall to allow UDP packets at least up to 1500 bytes
(Internet MTU) or disable EDNS on the DNS server.

828731 - An External DNS Query May Cause an Error Message in Windows Server
2003
http://support.microsoft.com/default.aspx?scid=kb;en-us;828731


--?
Best regards,
Kevin D4 Dad Goodknecht Sr. [MVP]
Hope This Helps
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