[qmailadmin] Blank Passwords

[qmailadmin]

Heyyas,

     I was wondering if there was a way to, or any plans to add a way  
to disallow blank/empty passwords? Due to a lot of traveling I like to  
use my qmail/vpopmail server as a relay, closed to the  world  
obviously, but open to anyone who can authenticate. A fair amount of  
people use the system, some of which are not tech savvy.

    I've had a few problems caused by people scanning for accounts  
with blank passwords, finding one, and exploiting the account to relay  
spam. I understand that this is really an administration issue, but  
rather than have a cronjob that mails me a list of accounts without a  
password, it would be nice if there was a way to not accept a blank  
password. If anyone knows how to do this on a vpopmail level as well,  
that would rock.

Thanks,

Korf