The improve to macOS Catalina is inflicting Mail information loss for some customers, in accordance with Michael Tsai, developer of the favored SpamSieve plug-in.
In keeping with Tsai, he is been contacted by quite a few customers who report that after updating from Mojave to Catalina giant numbers of messages are lacking or incomplete. Moreover, shifting messages between mailboxes through drag-and-drop or AppleScript may also lead to clean message (solely headers) on Mac. If these messages are moved to a server mailbox, different gadgets see them as deleted after which sync that again to the unique Mac the place they disappear as properly.
Tsai is advising customers to carry off on updating to Catalina in the event that they have not already.
I don’t know whether or not these are as a consequence of Mail bugs or to different components corresponding to issues on the Mac or with the mail server. However my recommendation is to carry off on updating to Catalina for now.
This bug is very regarding for a couple of causes: customers might not even discover that something is mistaken, it will get synced to the server after which propagates to different Macs and iOS gadgets, and backing up and restoring is troublesome.
Making a backup is troublesome as a result of, even in case you set the choice, Mail not robotically absolutely downloads all messages. So the backup of the native information will essentially be incomplete. (See EagleFiler’s Importing Attachments directions for extra about this. I’m completely happy to have most of my mail archived outdoors of Mail.)
Restoring a backup is troublesome as a result of Mail information is continually altering. There isn’t a easy method to merge restored information in with messages obtained because the final backup, and in addition with the dwell information on the server.
You’ll be able to study extra about the issue on the hyperlink under. Should you’ve upgraded to Catalina, take a scan via your mailboxes and just remember to have no clean messages. Tell us in case you’ve skilled this difficulty within the feedback!