Mail may also be simply going to the completely wrong address, for some reason, and there needs to be some way to ask that this be corrected without requiring c

Mail may also be simply going to the completely wrong address, for some reason, and there needs to be some way to ask that this be corrected without requiring credentials that the recipient might not have. If not an unsubscribe link, then at least a reply-to address that actually works, or some way to handle a mistake. I had one email address that for some reason often ended up being mistakenly used for other people, and ended up enormously frustrated by the usual combinations of no unsubscribe links, no-reply senders, and notes that any changes should be made by logging in. In the worst case, the US Department of Education, for several years, sent the address private personal and financial details about a complete stranger at a university with student loans. There was no way for me to unsubscribe, and no monitored address to reply to: in their view, they were important emails for the recipient, and they were, but I was not the intended recipient at all.