Public bug reported:
This may be an issue with gmail and possibly elsewhere. See https://mail.python.org/pipermail/mailman-users/2014-March/076294.html
** Affects: mailman Importance: Undecided Status: New
** Tags: mailman3
** Tags added: mailman3
This bug has been moved to the new gitlab repo here: https://gitlab.com/mailman/mailman/issues/75