Bugzilla sends the following to a new user (after receiving the primary address):
We recommend using a secondary account or free web email service (such as Gmail, Yahoo, Hotmail, or similar) to avoid receiving spam at your primary email address.
Which publicly available service (paid or free) is suitable and reliably forwards Bugzilla messages to the primary address?
I've rejected Gmail because it often misIDs a Bugzilla message as spam, and having done so, omits to forward it to the primary address.
I've rejected Fastmail because it has a known issue wherein it tampers with headers breaking the ARC signature and causing forwarded email to be properly rejected by Gmail.