I have an exchange server that sometimes has trouble resolving DNS names when sending mail, I’m using my ISP’s DNS servers to resolve DNS. The error that I get when I have trouble sending mail to certain companies says “The destination server for this recipient could not be found in Domain Name Service (DNS). Please verify the email address and retry. If that fails, contact your administrator #5.4.0 >”. I do an NSLOOKUP and sometimes my server can resolve the IP to Domain name, but sometimes it can’t. Then when I query the MX record using NSLOOKUP, again sometimes my server resolves it and sometimes it doesn’t. If I try to telnet to the MX record IP, port 25, sometimes it works and sometimes it doesn’t. I go out of my network, usinga dialup and do the same steps most of the times all works fine, unless the remote server is actually not working at that time.
I think maybe my ISP’s DNS servers might not be too reliable, so my question is how can I configure my server to bypass my ISP’s DNS servers when sending mail.
FYI, I am using forwarders on my DNS server, the forwarders I”m using are the DNS servers that I got from my ISP.
Any advice is appreciated.
thanks
