https://portal.smartertools.com/kb/a2930/whmcs-provisioning-module-for-smartermail.aspx
We updated to work on 6.x and it works on 7.2.x as well. I tested it a couple weeks ago. Make sure to do what that "NOTE:" says on the page, otherwise the provisioning module will not work.
Matt Petty
Software Developer
SmarterTools Inc.
(877) 357-6278
www.smartertools.com