Exchange SMTP relay problem! Plz Help
I have two problems that relate. First lets start out with that i have, I have a single domain with active directory with dns. Yet i have the exchange server off site for various reasons (dont let other employees touch things they arnt supposed to when they dont understand them and they are critical). When i use SMTP locally to my external exchange server, i receive the emails just fine (it routes locally somehow?!). When i use the SMTP locally to a different email exchange server such as yahoo or gmail, i get an error and it wont allow me to relay the message.
Then for another instance if i use a virtual smtp server in IIS and try to relay message to my exchange server i cannot receive it. YET! then when i try to relay a message from that virtual smtp i can receive message on my yahoo or gmail account.
The only thing i can come up with is that there must be something weird going on with Active Directory or something. Cause i talked to the techs that host my exchange server and they opened up all the ports for me to allow me to test the relay and i still cannot receive messages (I know unsafe but it was just a test to see if there was something blocking it).