Undelivered Mail Return to Sender

Perhaps a long shot:

Do you use VPN? If so, delete the VPN profile in Settings/General/VPN & Device Management/VPN. Don't just turn it off; delete the profile.

Starting with the last issue first, that message means that, for whatever reasons, your email to your boyfriend was not able to be delivered. I think the problem may be with your iCloud account. But this isn't really my area of expertise.

The fact that Verizon says the problem is with the phone and not with them doesn't necessarily make it so. Their customer service agents have quotas and, if they can't figure out your problem within a certain period (they used to have to keep their average call time to 7 minutes), they may try to blame something else.

I would start by contacting Apple anyway. They can run a lot of diagnostics remotely. Or you can make an appointment at your local Apple Store if you have one.

Product Feedback - Apple

The diagnostics they run can rule out (or in) hardware problems. They will then be able to give you next steps.

There is one thing you might try while waiting. Go to Settings>General>Transfer or Reset iPhone>Reset>Reset Network Settings. The only thing you'll lose is saved WiFi passwords.

I would delete your email account on Mail and re-enter it just as long as you know your password. If you have a second email I would also enter that into your Mail and try both when emailing you bf.

Profile apps - these are apps that are so invasive and or so corrupt that they couldn’t pass Apple’s reasonable tests to be in the app store. You put your phone and its contents at risk to install them, because the profiles essentially permit the apps to hack iOS and to bypass the iPhone’s security protection. There are over a million apps in the app store. You should be able to find a legitimate app for every need.

Someday, you won't need to follow me around and add that! I may actually remember it. ;-)