MDaemon not sending mails

[forthug]

Hi there,
my MDaemon server was working so nice except today it began not sending the mails, it tells me:
The packet from DNS server contained an outdated response,
the name server report that it's having technical problem.

please help me what to do, I've never changed anything to arise this problem.
Thanks

 

[forthug]

Well I have fixed it, the problem is from my ISP their DNS was not working i put the IP address of their SMTP instead of mail.domain.com and it worked.