I have attempted to send other users at Wikipedia, Wikiversity, Commons, and Wikidata emails regarding specific matters pertaining to those projects and all of these have not been sent. I asked for additional tests from other Wikiversity users at url=https://en.wikiversity.org/wiki/Wikiversity:Colloquium#Email and described the 'bug'.
@Aklapper:Actually, the situation has worsened. I went to Wikipedia to send a test message and found the "email this user" application on the left menu missing. When I went to my user page under "preferences" I read that my email address was unconfirmed. I clicked on "Confirm email address" at 19:26 UTC, 1 October 2016. Then the message "A confirmation code has already been emailed to you; if you recently created your account, you may wish to wait a few minutes for it to arrive before trying to request a new code.". As of 20:20 no email had been received. I clicked on the button "Mail a confirmation code" at 20:21. As of 22:09 no email has been received. My correct email is listed under my preferences.
There have been some improvements:
- I've received emails from Wikiversity!
- Another user I've sent an email to received an alert, but not the email!
- My email address has remained confirmed.