Hi, I tried your useful plugin and it seems to work great.
I tried registering specifying blocked domains and it works.
The problem is when the domain is NOT a blocked one.
It registers correctly the new user record but shows a PHPMAILER ALERT on frontpage with last mail entered.
Furthermore, no mail is been sent to new users (and his entry is blocked because I use standard joomla registering method with confirm via mail).

Any hints?

Thanks,
A.

P.S.: complete message is : PHPMAILER_RECIPIENTS_FAILEDusername@domain.com

Nevermind, solved:)