notifications from Twitter

First, I think you want to edit out your e-mail address in a public forum.

What are your spam blocker settings ... from webmail click on Settings/Spamblocker Settings.  Do not select the 1st option "Delete incoming junk", select either of the other two, that will either move detected spam to a separate folder or tag the subject line.  If you have the 2nd option selected "move to Spam folder" check your spam folder for missing mail.  HTH.

Yes, it is a Cox issue. I am having the same problem, have checked my spam settings and that isn't the problem. I have to use an alternate gmail address to contact Twitter Support, but unfortunately my cox email address is associated with my twitter account. Twitter sent me this to my alternate email address:  "If your email is being regularly bounced back to us as undeliverable, we won't be able to consistently deliver your important notifications to that email address. If you'd like to troubleshoot further with your ISP, you may want to ask them to make sure they're whitelisting email from twitter.com. Please note that we aren't able to retrieve bounce logs for individual bounced emails."   So it appears until Cox changes it's email practices, we both will be locked out of our Twitter accounts.

I changed my spam settings several weeks ago to allow all spam into Inbox and I am still not getting anything from Twitter support. Obviously the problem is with Cox if there are multiple people reporting the same problem and we are all able to get emails from Twitter support in our other email accounts.