Hii All,
We are using exchange server 2013 untill recently it was found that many emails were getting stuck in queue.
However when i configure network card with external public dns(8.8.8.8) and check the option use external dns lookup in send connector then all the external domain emails are going find and quick. but internal emails get stuck in queue.(This is happening for few domains and for others its working fins)
But with above configuration in place we are facing problem in sending/receiving internal emails.Again we have to remove the public dns from network settings and unchck the option use external dns lookup from send connector settings. Then all internal emails works fine.
IAM NOT SURE WHERE i am going wrong WITH THE CONFIGURATION is it with the DNS or the exchange settings.
Thanks in advance