- Plesk 10.x for Linux
- Plesk 11.x for Linux
White-listing and blacklisting doesn't work in Horde webmail.
Horde blacklisting filter has a special way of applying blacklisting filters. Filters are not triggered upon receiving new email, but are manually applied.
Packages should be installed, namely:
It is needed to press the 'apply filters' in Horde interface under
and email items from blacklisted senders would be removed/moved to spam.