I have to dig out this old thread again, because I have the same problem.Just for anyone having the same problem, yes it was the board URL.
update. It seems that the problem is my email software. If I read the confirmation email online, I can clik on all links.I have to dig out this old thread again, because I have the same problem.
But no matter what I change for the the board URL, it does not help.
Registration emails are sent successfully, but none of the links inside of the confirmation email are clickable. No error. Nothing happens.
I installed XF in the directory "forums" (in the root is wordpress)
What else could be the reason? Can I search with phpmyadmin for something in the database?