Email content missing

Hey there!

Can you say if this goes for every account that you have in the Mail app? Or just one specific account?

I’m not sure on what you’ve tried before, but I’d give these steps a try if it goes for all accounts:

First, rebuild your Mailboxes:

Rebuild mailboxes in Mail on Mac - Apple Support

Otherwise, I would force a re-index:

Quit the Mail app.

Open Finder.

While holding the Option key, on the top menu click Go > Library.

In the ~/Library, open:

Mail > V9 > Mail Data.

In there, delete any file beginning with “Envelope Index”.

Relaunch the Mail app while holding the Shift key, and let the mail re-download.

I’d think that would do the trick.

Otherwise, if the issue is specific to one account, I would delete the account in System Preferences > Internet Accounts, and re-add it. Just make sure it’s an IMAP account as most are nowadays, but still always a good idea to keep backups, and even exporting copies of your Mailboxes:

Import or export mailboxes in Mail on Mac - Apple Support

Another possible reason, would be network issues. Especially if it affects all accounts.

I would check for any VPN running in System Preferences > Network. If you have an interface on the left column indicating some VPN or security software, try clicking on it, clicking the “-“ bis low to remove it, click “Apply” restart the Mac and test.

Hope something here helps!

Q - " I am running a MacBook Pro 14" M1 with Monterey 12.01 and Mail version 15. "

A - This may partially related and may help fix the issue. Update Monterey to the current version 12.3.1 released March 31, 2022.

It brings may Bug and Security Fixes

Do preform A Time Machine Backup before updating

I'm running Monterey 12.4 with the same problem.