MagicSpam is still working even if it was disabled in Plesk GUI

Symptoms

MagicSpam extension is still working even if it was disabled in Home > Extensions > MagicSpam > Disable:

MagicSpam daemon still reports some logs in /var/log/maillog, for example:

CONFIG_TEXT: magicspam-daemon[4576]: magicspam-iprange.c:745 ERROR __sane_ip(): Sorry but this system does not yet support IPv6 range checks for address [::1]

MagicSpam daemon is running on a server:

# service magicspam-milter status
magicspam-milter is active and running [1711]

# service magicspam-daemon status
magicspam-daemon is active and running [1683]

Cause

This is Plesk extention bug with ID #EXTCERT-1054, which will be fixed in future product updates. The bug is that the option Disable for MagicSpam only disables user access to the extension but does not disable extension work on a server. 

Resolution

Disable the daemon completely on the server:

1. Connect to the server via SSH
2. Run the following command to disable daemon:

   # /etc/init.d/magicspam-daemon stop
   # /etc/init.d/magicspam-milter stop