Hi,
My boss decided to start another company and now we have 2
new people working in our domain, not using exchange (nor
outlook), but using a hosted POP3 server and an external
SMTP server we own and manage.
Using outlook express I get 550 "unable to relay.." errors
while the SMTP server (that requieres authentication) is
correctly configured. When I use a dialup and the modem it
works fine. Also when I go through the hassle of
reconfiguring IP and connect the laptop directly to the
ADSL router.
What does ISA do, so I cannot send email using
authentication? I can ping the server...
Also, when I use the full outlook client, I disable the
exchange service and only have internet email, configure
the accounts, the error when sending messages looks
exactly the same as an exchange NDR. Therefor I suspect
that exchange picks up the message and tries to relay it,
while stripping the user credentials....
Help!
Thanks,
Sam