I've just installed a new SBS 2011 server, exchange all working, no problems.... however.... We have a couple of users who connect using POP accounts, again, all working, mail downloading without a problem.... until - they try to send mail!
Normal outlook/exchange account access is receiving and sending no problem.
What should I be configuring/looking for in order to get it working?
If I try to send an email, all I get is:
The message could not be sent because connecting to SMTP server mydomain.local failed. The server may be unavailable or is refusing SMTP connections. Please verify that your SMTP server settings are correct and try again, or contact the server administrator.