I don't think this is the case. I requested a magic link for a team and entered an email address but it turned out to be the wrong email address for that team.

I don't think this is the case. I requested a magic link for a team and entered an email address but it turned out to be the wrong email address for that team. Slack gave me this message in my email: You requested a magic link for logging in to [foo].slack.com. Unfortunately, this email address isn't currently associated with that team. We also searched for Slack teams you've already joined or are allowed to join, using [email address i entered]. It looks like you have several! And then it lists a bunch of teams associated with that email address and includes Join buttons.