Email user and password for OSQA

Dear all,

OSQA has installed without problems using your package. Trying to set up email I have also installed Postfix, under Ubuntu, and mail is both sending and receiving out of the box. Now... does anybody now what OSQA means by "Email User" and "Email Password". Is it the login/password combination for the user to be in charge of email? I ask this because I have tried it, but nothing seems to happen.

I should add that the entries under /var/log/mail.log yield

postfix/smtpd[8015]: timeout after EHLO from localhost[127.0.0.1]
postfix/smtpd[8015]: timeout after EHLO from example.com[<my IP>]

respectively as I try "localhost" and my domain "example.com" under "Email Server".

Thanks in advance for your help.

Best regards,

Ezequiel