SMTP Problem, all mails get into bad mail folder

[JustBeginning]

hi all,
i have a strange problem.All the mails i try to send through my SMTP server drop in the bad mail folder.It was working fine with IIS 4.0 and windows NT Server 4.0.I shifted to win2k pro and IIS 5.0.I have specified a FQD name.When i check the bad mail folder i get a failure notice with error code 0xC00402C7.
Thanks in advance,
Niranjan

 

[Guest_imported]

This happens because of a DNS issue. The TechNet article on fixing the problems is here:

http://support.microsoft.com/default.aspx?scid=kb;EN-US;q276347

 

[Guest_imported]

HI,

I have the similar problem. I read the support from MicroSoft but it's not solve the problem at all...

Is anyone figure out how to fix it....

Look like MC recommend using smart host because your DNS server not support TCP queries... so which smart host IP address should be use, your DNS domain controler IP address?