Error 5.1.0 Sender Denied

M

Michael Wacht

Hi all,

I am using Entourage X on a G4 through a VPN to connect to an Exchange
Server. I am using the Exchange connection feature. I just got back from
vacation and I find that I can receive and read e-mails, but I cannot send
e-mails.

I get the following error:

5.1.0 Sender Denied
Error: 5554

I can send and receive e-mails through a Web connection and my Windows98
box.

My network admin is at a loss (but he doesn't like/understand/deal with
Macs).

I've deleted and re-set-up my account. I've checked/unchecked all the
combinations under the SMTP server, including re-entering the server name. I
opened the Progress window. It sends the hello message, but stops when
sending authorization protocol and logs off the server.

Can anyone offer any help, please?
 
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