Hello all. Ok I need a little knowledge here about how this is setup. We have an external facing web box in-house at one of my client sites. Also in-house there is an exchange server that supposedly has SMTP setup, not sure how that is setup and would love if someone can explain how this is setup. Anyway the network guy told me the SMTP host name such as "mail.[domainname].com" which I beleive it the non-authoritive name whatever that means :). Well the username and password was told to me at the time I did not need it. Now however I am getting an error when trying to send an email about incorrect username or password etc. Nothing has changed on my end so I beleive something else changed on the networking side. First how would an external box access this SMTP server as the host if it is internal? (Firewall?). Then if that is the case where would the SMTP setup reside on this exchange server and can a username and password be setup? Hopefully this makes some sense as I am tying to educate myself on the networking side of things so I can properly battle if need be :).