Hi Support, SMTP could not connect to any DNS server. Either none are configured, or all are down Is there anybody can provide some advice to this issue ? Thanks. Victor.. Regards & Thanks

Hi Victor, Would you please give us some more information: 1. When do you get this error? 2. What are the symptoms? 3. Recent Changes Thanks Vinit

Hi, Please check the configuration done on the SMTP connector on the exchange server. Is it configured to use a smarthost or is it using a DNS server? If it is using a DNS server than check if the server is up and running and also if it is reachable from you exchange box. Mahendra

Hi victor, I think it is better for you to explain your problem in detail. If you mean Exchange cannot connect to DNS Server, you can follow these steps to troubleshoot the problem: <1> Check the DNS setting on the Exchange Server is right. How to Configure DNS Settings on the Exchange Server http://technet.microsoft.com/en-us/library/aa998740(EXCHG.65).aspx <2> Make sure the DNS server is working OK. <3> Use Ping command to check for the network connection between Exchange Server and DNS Server. Thanks, Evan