I have a friend in the military (navy to be exact) and whenever I try to e-mail him from my domain techtwists.com I get a message undeliverable error. However if I send the message from my yahoo account it works
any ideas
This message was created automatically by mail delivery software.
A message that you sent could not be delivered to one or more of its
recipients. This is a permanent error. The following address(es) failed:
*******@**.***.NAVY.MIL
unrouteable mail domain "**.***.navy.mil"