New comment by leahneukirchen on mblaze repository https://github.com/leahneukirchen/mblaze/pull/173#issuecomment-606146950 Comment: Well, I have some private addresses that are listed as Alternative-Mailboxes to get the `>` sign, but that I don't use for replying. Also, people could use From: addresses that are not in Alternative-Mailboxes (e.g. a shared helpdesk email).