when i try to send E-mail From any outside domain to our Exchange 2010 server give me message
#554 5.4.4 SMTPSEND.DNS.MxLoopback; DNS records for this domain are configured in a loop ##
Note: we use external MX record from our ISP company
our Domain not Have MX record
the problem in receiving but sending no problem
also what about send connector and receive connector configuration
thanks for all