change the envelope-from on subscription request confirmations in newsletter
in https://gitlab.torproject.org/tpo/tpa/team/-/issues/40286 (confidential issue), @smith reported receiving a significant number of bounces at info@tpo. after investigation, it turns out those are subscription attempts that bounce. here's a part of those messages:
Subject: Please confirm your subscription to The Tor Project newsletter. From: The Tor Project <email@example.com> Message-ID: firstname.lastname@example.org X-Mailer: PHPMailer 5.2.27 (https://github.com/PHPMailer/PHPMailer)
the envelope-from (AKA the
Return-Path header or
MAIL FROM command in SMTP) of those messages is also set to info@torproject.
this should be something that is capable of handling those bounces, or devnull.
@eric, can you take this on?