How can I recover email messages from an old Mail folder?
I have a 2019 iMac running Big Sur. Many of my Mail messages got corrupted when I transferred data from my old computer. These messages still show the sender and subject, but there is no content. I have tried using Time Machine, but it will not recover these messages. I have the boot SSD from my old Mac attached as an external drive and I can get to the old Mail folder. Is there any way I can use it to recover a few specific messages I need?
iMac Line (2012 and Later)