I was getting some SASL-errors when trying to send email with my mta.

Like theese:

postfix/smtpd: warning: SASL authentication failure: cannot connect to saslauthd server: Permission denied

The new debian (5)-packages for sasl seem to differ a little bit from whats in the guide, but i did this to solve my problem (added the postfix user to the sasl-group):

adduser postfix sasl

 /etc/init.d/postfix reload