[horde] exist a hook "on_password_change" ?

[A. Schulze]

Hello,

we build a horde+imp system using horde database to store userdata.
the MTA has to know about existing users and authenticate them.
For speed and robustness we won't let the MTA query the horde database.
Instead we export them. Now we run in trouble if users change passwords.

Are there hooks that we my register to be called if
  - a new horde users is created
  - user change passwords
  - user reset passwords

Otherwise we have to switch our userdb to a ldap system or so.
That's what I like to avoid for now.

Andreas