[RandomBacon]

> The best you can hope for really is that they put a link in the email to disavow the account with one click. I've only seen a few companies do that but I really appreciate it!

That's a great middle-ground, and I think I've only seen that once.

[HappMacDonald]

Such links might disavow in practice, or might alternately be used as "hey, this email address has a living person at the other end, update the alive status on your spam lists and sell the data point!"

[RandomBacon]

I would only use that wth legitimate companies. Your scenario is no different than spammers who already have "unsubscribe" links.

[gmerc]

That’s not a middle ground at all that offloads the cost of your growth to unrelated parties who are potentially being defrauded. Typical tech ploy.

[toast0]

Look, when option A is actually make sure your user gives you contact info that works, option B is include a link that stops sending garbage for a user that doesn't know their email address, and option C is signing up with an email address results in an unending stream of garbage...

I would prefer option A, but I'll accept option B, because it's better than option C.