TW 4.7 Mail not working

Hi all, we did a clean installation of Teamwork 4.7+M.25010 with postgres. Here further system infos:

Databases Connected to: jdbc:postgresql://localhost/teamwork with user: postgres

System properties Java version: 1.5.0_16,Sun Microsystems Inc. Java VM: Java HotSpot(TM) Server VM 1.5.0_16-b02,Sun Microsystems Inc. OS-System: Windows 2003 5.2,x86

We created an SMTP user from scratch and correctly configured the SMTP. No SMTP authentication needed. We don't receive any kind of notification by mail. Nothing.

The same configuration has been used with the previous 4.6 version and everything worked fine. All the Teamwork processes seem to correctly work.

Any ideas?

Regards