Reply To: Cant update emails

The problem was/is a misconfigured server. If a underscore (_) is in the URL it gives out a 404. As standard, _ is a valid URL character. I couldn’t find the setting that’s responsive for that, but it seems to occur on a few servers.

I’ve changed now that the URL wont have a underscore in it, but your server is still misconfigured. At least in that point.