[Slashcode-general] Can't send emails

[Cristian F. <cri...@gm...>]

I installed slashcode with postfix. The Mail::Sendmail module managed
to send the test email and I can send emails from the localhost. The
problem I have is that slash does not send any email with the
passwords of the new users.

I found this in the logs:
Use of uninitialized value in numeric eq (==) at
/usr/local/share/perl/5.8.8/Slash/Messages.pm line 460.
Use of uninitialized value in numeric eq (==) at
/usr/local/share/perl/5.8.8/Slash/Messages.pm line 460.
Use of uninitialized value in pattern match (m//) at
/usr/local/lib/perl/5.8.8/Slash/Utility/Data.pm line 208.
Use of uninitialized value in pattern match (m//) at
/usr/local/share/perl/5.8.8/Email/Valid.pm line 59.
[Mon Nov 26 22:40:23 2007] [error]
/login.pl:Slash::Messages:/usr/local/share/perl/5.8.8/Slash/Messages.pm:551:Error
sending to '' for user 11: Invalid address
[Mon Nov 26 22:40:23 2007] [error] Which was called
by:Slash::Utility::System:/usr/local/lib/perl/5.8.8/Slash/Utility/System.pm:226\n

Any idea for what could be the problem?

Thank you