I have registered 4 times to this board. The first 3 used variations of my regular work email address. No activation emails were ever received. Those email addresses all go to Microsoft Office 365 (Exchange). The 4th try (the account I am currently using) is a gmail.com address.
I am guessing the plumbing under the sheets of the CEF Forums has one or more issues with connecting to Microsoft SMTP.
And unfortunately there are 3 bad registration attempts that have not been activated due to this issue. Those 3 are either docvue.com (the new name) or fullcirclesystems.com (the old name). The company changed it's name 2-3 months ago.
Hope this helps folks.