No Mail notifications

1. Check your notification settings. Make sure that Mail is enabled for notifications in Settings > Notifications. You can also customize your notification settings here, such as the sound that plays when you receive a new email and whether or not you want to be alerted for new emails from specific senders.
2. Restart your iPhone. Sometimes a simple restart can fix minor software issues that are causing problems with notifications.
3. Reset your network settings. This will reset all of your network settings, including your Wi-Fi network passwords and cellular settings. This can sometimes fix problems with notifications that are caused by network issues. To reset your network settings, go to Settings > General > Reset > Reset Network Settings.
4. Restore your iPhone from a backup. If you have a backup of your iPhone, you can restore it to get back to a point where Mail notifications were working properly. To restore your iPhone from a backup, go to Settings > General > Reset > Erase All Content and Settings. Then, when prompted, choose to restore from a backup.

If you've tried all of these things and you're still not getting badges and alerts for Mail, you can contact Apple Support for further help.

I hope this helps!

Which email account are you referring to? Google, iCloud, AOL, Exchange, Outlook, Yahoo or any Other (Refer to the pic )below

1. Is this your corporate iPhone? Then please contact the system administrator of your corporate
2. If it is your personal device, in that case, do you have any profile installed by your corporate/organisation/enterprise/School Management?
   1. Erase the profile added by you If you have installed a profile on your own --> Install or remove configuration profiles on iPhone - Apple ...
   2. Or please contact the system administrator of the organisation who provided the profile to you

I am having the same problem. I was at the apple store yesterday and my phone was reset to factory settings and now I do not even have the option of "Notifications" under my "setting - mail" OR "Notifications" . I will be checking back to see if you find a solution. Good luck!