Use Transports
JEMHC supports email as a primary transport for notifications but also supports other messaging transports:
https://thepluginpeople.atlassian.net/wiki/spaces/JEMHC/pages/128319646
https://thepluginpeople.atlassian.net/wiki/spaces/JEMHC/pages/137003054
https://thepluginpeople.atlassian.net/wiki/spaces/JEMHC/pages/1130659844