uddeIM is not Sending Email Notifications

We recently migrated to a new server, which I suspect may be the problem, but not sure. But uddeIM is no longer sending notifications to users even though the admin settings are to send them - see attached.

Joomla 1.5.28
CB - 1.9
uddeIM - 2.8 stable

- Some MTA do not send messages when the domain part of the E-Mail address is different from the domain the site is hosted on.
- Some servers do not send messages when a full email address is used, try the username without "@domain".
- Try mosmail instead of phpmail (or vice versa).

- Some MTA do not send messages when the domain part of the E-Mail address is different from the domain the site is hosted on.

This is not the case with us, messages from Joomla and Kunena are working fine.

- Some servers do not send messages when a full email address is used, try the username without "@domain".

See above

- Try mosmail instead of phpmail (or vice versa).

switching from phpmail to mosmail seems to have done the trick - thanks!