Unpaidhelper - 2013-10-01

im am using "$CONF['encrypt'] = 'dovecot:SSHA512-CRYPT';" (salted SHA) to generate the passwords for the user mailboxes and admin accounts.
For the Postfixadmin user and admin Login I taught postfixadmin to authenticate them with "doveadm auth".
I created the dovecot socket authclient with access for www-data user
Everything is working fine.

Just want to know if someone can see a security issue ?!