Hi,

I don't know how it is implemented on 1and1.com but I can explain how I implemented this functionnality for my own domain.

I'm using a mysql database to store domain, user, aliases, etc... map for postfix and dovecoat.
the database table is created using postfixadmin
see http://postfixadmin.sourceforge.net/

this done, I configured postfix and dovecot to use this database as the source of information.
For dovecot use sql authentication

and using the password plugin in roundcube is just a matter of configuration
the only to lines to change is the database DSN (containing host, user and password for database connection) and the password update query which is for me :

$rcmail_config['password_query'] = 'UPDATE mailbox SET password=MD5(%p) WHERE username=%u AND password=MD5(%o) LIMIT 1';

regards,

S. Blaisot


Le 10/01/2013 04:04, Raul Elenes A. a écrit :