554 buildaddr: no host

[BIS]

Hallo People,

This has been driving me nuts for a while. I have two 7.3 servers (one dedicated mail server). When I try to send from one to th emailserver, the mail bounces with:

----The following addresses had permanent fatal errors----
someuser@mydomain.com
(reason: 554 buildaddr: no host)

I am totally lost to this one. The user exists.

Any ideas?

 

[Weppie]

what command do you use to send mail ?