observe_mailinglist_message/2
Send a welcome or goodbye message to the given recipient. The recipient is either a recipient-id or a recipient props. ‘what’ is send_welcome, send_confirm, send_goobye or silent.
Type:
Return:
#mailinglist_message{}
properties:
what:
send_welcome|send_confirm|send_goodbye|silent
list_id:
m_rsc:resource()
recipient:
proplists:proplist()|integer