Topic: New password schemes support in iRedAdmin: SSHA, SSHA512.
New release of iRedAdmin (both open source edition and iRedAdmin-Pro) supports two new password schemes for MySQL and PostgreSQL backends: SSHA, SSHA512. Currently, MD5 is the default password scheme for MySQL/PostgreSQL backends (SSHA for OpenLDAP) in iRedMail. You can set SQL_DEFAULT_PASSWD_SCHEME = 'SSHA512' in iRedAdmin config file (libs/settings.py or libs/settings_local.py (recommended)) so that new users' passwords will be hashed with SSHA512.
SSHA512 requires Dovecot-2.0 (or later) and Python-2.5 (or later).
SSHA512 requires more CPU from your server, which means it will slightly (maybe huge, depends on how many active users you are serving) slow down user authentication (IMAP/POP3/SMTP authentication).
Reasons why SHA512 is superior to MD5: http://stackoverflow.com/questions/2117 … ior-to-md5
Dovecot password schemes: http://wiki2.dovecot.org/Authentication/PasswordSchemes