I was also running into this issue. Strangely enough it was for some users but not others. I was able to send test emails just fine but no email for @mentions. I thought it was a permission issue, which turned out it wasn't, but after digging about for a couple of hours I found the culprit. So, it all depends on how your user directories are configured in Jira. If you are running off of AD, then you must ensure that the 'email' field in the 'General' tab for user properties, has the user's email address defined. This has to be configured on the domain controller, so you may have to get with your site admin for this unless you are your own site admin. If you are doing an internal directory, the email is a required field so you may have to troubleshoot other issues if you still can't get notifications. Basically, make sure that your authentication server has user's email addresses defined.
You must be a registered user to add a comment. If you've already registered, sign in. Otherwise, register and sign in.