Update agir/lib/mailing.py
Update agir/lib/mailing.py

Co-authored-by: Giuseppe De Ponte <50c24130b285123ce7fcca34d80dca1fe62227e5@users.noreply.github.com>
lafranceinsoumise/api-django,lafranceinsoumise/api-django,lafranceinsoumise/api-django,lafranceinsoumise/api-django