/upload/language/lang_english/email/group_request.tpl

 1Subject: A request to join your group has been made
 2Charset: UTF-8
 3
 4Dear {GROUP_MODERATOR},
 5
 6A user {USER} has requested to join a group you moderator on {SITENAME}.
 7To approve or deny this request for group membership please visit the following link:
 8
 9{U_GROUPCP}
10
11{EMAIL_SIG}