bsmtp authentication

Hi guys

I am trying to set up the messaging part of bacula to send alerts and 
using the built in bsmtp, but running into problems

The SMTP server that we are using needs authentication for the senders 
adress, and it seems like bsmtp does not handle this, i.e there is no 
way to send a password for the sender to the smtp-server, am i correct 
or did i miss something??
And if this is the case, what is the alernative aside from using another 
program instead of bsmtp??

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Ampfield Aktiebolag
Mehrdad Ravanbod
System administrator