THIS DOCUMENT CONTAINS NOTES FOR EXPERIENCED SYSTEM ADMINISTRATORS ONLY.

USE ENTIRELY AT YOUR OWN RISK.

You need to use SMTP-AUTH to ok your message to be relayed on to the final recipient.

You should connect to the OA5 server on port 587 (known as "submit")

doing this will ensure your correspondents are whitelisted when they reply to you, and their mail can bypass many of the anti-spam checks.

In SBS exchange system manager, there are 2 places to change things. Under connectors, delete Small Business SMTP connector (NB SBS 2003 only NOT 2000) if you're not using POP3 to pick up mail you can delete that connector as well This area does not exist in full exchange servers.

The real setup is under servers / server name / protocols / SMTP / Default SMTP Virtual server --- highlight, right-click and chose properties -- in the popup there are 4 tabs -- chose Delivery. On that page there are some buttons to let you complete the configuration:

Outbound Security sets the username and password (select basic security),
Outbound Connection for the port (change to 587, default is 25)
Advanced to set the host to connect to (mail.oa5.com).