Improve hook_civicrm_alterMailParams re: headers and flexmailer. fix #654 (!655) · Merge requests · Documentation / Docs / Developer Documentation · GitLab

homotechsual requested to merge github/fork/artfulrobot/altermailparams into master Jul 28, 2019

Created by: artfulrobot

This adds specifics to the documentation:

flexmailer
headers
hook called twice for message template sends