We are running exchange 5.0. on a Nt4.0 server. We use a ADSL modem/router.

WE used to use a dial up account and everything worked fine. Now we have
this adsl modem/router, all our email can come in, but nothing will leave.
It sits in the outbound mail queue and wont send out. We tried Mdaemon and
that works fine.
Can anyone shed some light on what we may be doing wrong in exchange?

thanks Anne