Hi,

Help please!!!!!
I am using outlook express for emails. I have a problem sending out
mails
externally. Accessing email thru LAN - BM35 server as internet
surfing.
However users can't seem to send out emails. Receive the following
error
message:

The message could not be sent because the server rejected the sender's
e-
mail address. The sender's e-mail address was 'test@sea.com.sg'.
Subject '', Account: 'pop.singnet.com.sg', Server: 'XXX.XXX.XXX.XXX
Protocol: SMTP, Server Response: '554 Mail from test@sea.com.sg
rejected
for policy reasons.', Port: 25, Secure(SSL): No, Server Error: 554,
Error
Number: 0x800CCC78

Have checked that this email address is valid.
Users are still able to surf the interent except sending & receiving emails. Received the following error too:

No route found to domain manutd-sea.com.sg from server SGFJSMTP/FJB.

Check DNS configuration.

Is there a configuration error in the DNS over at the LAN? Please
advise.