New Features
############

None

Bugs Fixed
**********

Fixed check for recipients in mention notifications.
Added missing module registration to customer interface.
Fixed content type of output of AJAX backend modules Kernel/Modules/AJAXRichTextAutocompletion.pm and Kernel/Modules/Mentions.pm.
Package Znuny-SMIME will now be uninstalled on Znuny upgrade.

Read about all changes in teh `CHANGES.md <https://github.com/znuny/Znuny/blob/rel-6_4_2/CHANGES.md>`_