The user does not receive the confirmation email

When a user requests an email address change, they do not receive the confirmation email. (Test emails in the general settings are delivered successfully.)

Mail server issue, mail probably goes to spam because it has link

Yes, it was that simple. I hadn't noticed it. It's the phone's fault for not having a spam folder.

I was mistaken; the emails aren't in the spam folder either. When I click on "change email," it redirects me to the home page.