vex wrote:

Your message did not reach some or all of the intended recipients.

Subject: test
Sent: 6/20/2006 3:13 PM

The following recipient(s) could not be reached:

Lname, Jay on 6/20/2006 3:13 PM
553 sorry, that domain isn't in my list of allowed
rcpthosts (#5.7.1)

This is usually caused by a failure to authenticate properly to the outgoing
server.
--
Brian Tillman