Help! I upgraded to macOS Monterey now I can't read my emails

[LibinMo]

During the upgrade there was a box to check & enable Mail Privacy Protection, like an idiot I went ahead & checked it. Now when I open mail all I can see is the headers. I went to Mail/preferences/privacy and cleared the boxes that enable MPP. It doesn't do any good, even when if close Mail and restart the computer. Where are my messages & how can I get them back??? Can anyone here help?

[Sancho]

1. Happened to me too...very annoying...

...and no real warning. Different than other upgrades.

IDK how to fix it, so I've been recreating all my accounts in Mail.

[LibinMo]

3. I kept Googling for answers & found this:

It was in an Apple users forum. "I deleted my anti-virus (Avast), re-booted and iCloud mail returned to normal. Or you can turn off the AV function in System Prefs > Network."
I turned of the AV function. It worked like a charm. So far so good. Going 24 hours without email is just too much.

PS Turning off AV function didn't work too well-it kept turning itself back on. So I deleted a the Avast program.

[Tetrachloride]

2. 1. Call Apple tech support. you may have to pay

a fee. if yes , pay the fee and argue mostly later.

if they are reluctant , stop everything and ask for their name and a real supervisor.

2. i would tend to think that they have backups if the mail is iCloud.

3. in your home directory in the Library foldee , the Mail folder lives there. you might need the GO menu. make a duplicate of the Mail folder, Preferences and Keychain folders

[usaf-vet]

4. Apple... never rush to install upgrades give it time for the bugs to be worked out. Free help.

Signed

Retired Mac Computer Consultant. Experience dating back to Apple I through OSX 10.11.6 EL Capitan then retired.