Description:
Adds a new mail user filter.
Input Variables:
$session_id, $client_id, $params
Parameters (in $params):
mailuser_id (int(11))
rulename (varchar(64))
source (varchar(255))
searchterm (varchar(255))
op (varchar(255))
action (varchar(255))
target (varchar(255))
active (enum('n','y'))
Output:
Returns the ID of the newly added mail user filter.