Lost mail in OS Catalina upgrade

Apple seems to have improved the e-mail conversion/import program in macOS 10.15.4 (Catalina). It converted my Mojave (V6) messages without any of the problems that I saw before (missing messages, missing bodies of messages, wrong dates). The only problem that I'm seeing now is probably due to my manual editing of mail headers over twenty years ago. I have returned to using Apple Mail after using a couple other applications the last few months.

Michael Tsai says there are still reports of some problems: "... I already have multiple reports that the bug where messages disappear when dragged to another mailbox is still present. Another customer said that the update did fix the bug he was seeing where rules copied messages instead of moving them." (https://mjtsai.com/blog/2020/03/24/macos-10-15-4/)

Hi Ian,

I upgraded to Catalina, but not to Catalina Mail because the import program was flawed. Now I have upgraded to Catalina Mail by having it import my backed-up Mojave messages as of last October and by transferring messages since then from another app to Apple Mail.

Rick

I have the same problem, in the settings > internet accounts, all my accounts are gone and I can't seem to add new accounts for some reason.

I lost all my emails in Apple Mail doing a system upgrade to OS Catalina! Apple, how is it possible? My professional e-mails. It's catastrophic. Apple, wake up.

No user should have to sort out such a mess!! Have you been in contact with Apple support regarding this?

I don’t know if it brings your lost mails, but https://appleinsider.com/articles/19/12/10/apples-macos-catalina-10152-update-fixes-mail-photos-bugs

I was still trying to get Apple Mail to work for me. I didn't know that it would not display all my imported messages. Importing directly from the V6 folder into Postbox seems reasonable to me.

That’s strange, indeed.

Tried to import mailboxes with another app. ?

Hello,

I recovered all my emails (about 20,000) with 10.15.3. It seems that all is okay now.

Sorry to hear that. Do you have a back-up?

And what happened when you upgraded your iMac after the TM backup?

At first just the headers showed up and the body of the email was blank, When I tried to rebuild only a very small number of them returned the rest went "POOF!" Gone. I've tried importing from the library.mail but they're not there. Seriously any help out there? Bot on POP account and IMAP.

There is a neqw Catalina update (10.15.1), however in the release notes it has not been mentioned whether upgrading to Catalina leaves all emails intact now. (read also https://forums.macrumors.com/threads/psa-apple-mail-bugs-can-lead-to-data-loss-in-macos-catalina.2205346/) Has Catalina 10.15.1 resolved this? This is the reason I'm still waiting to upgrade to Cat...

Welcome to the club! Tell us if you find a solution.

I found this in an other discussion thread:

httpshttps://discussions.apple.com/thread/2508

but it was catastrophic, I lost all my pop emails on the iMac of my office. Like for the MBP at home, I downgrade to Mojave.

I solved the problem by switching to Outlook for MAC. If Apple cannot protect its own native mail server, what good are they? ALL emails should automatically back up to the iCloud, not just iCloud emails. What good is 2TB of storage, for what, Photos?