It most likely is a problem with cox.net. I¡¯m dealing with Cox right now over emails being delivered to me via Groups.io, that are arriving up to eight days later. A tech rep from Cox sees there is a problem, and they think it is on their end. They gave me work ticket number so I can check on their progress, but no answer back after two days.
Our group is a recent migration from Yahoo! Three members use Cox.net as their ISP. One of them is active in the group and reported two days ago that he was unable to receive the login verification email in 'real time', ie. within the timeout period. They are showing up about 24 hours later. He needs to set his password and to be able to log into the site and set his profile, etc. Note that he is getting the regular emails, Just not the item that is a Noreply type of email.
This leads me to think that the problem is on Cox.net's side and that they are holding the email for anti-spam verification or similar. He tells me that they are uncooperative and telling him its the forum server's issue.
In any event, does anyone know if? there is a work-around where I can set a password for him, so he can have full access?