Server 2008 an exchange 2010 send and receive delay
Hello all, I have changed exchange server from server 2003 and exchange 2003 to server 2008 with exchange 2010.
My new server is a virtual machine hosted by Microsoft hyper V.
I am suffering from some send and receive delay massages when I send to specific domain and if they try to send a mail to me they get an NDR
I tried to change my DNS server, checked blacklists, checked anti-virus and spam servers,