Apple Mail constantly crashing - how to isolate rogue message or interpret detailed error message
I have a MacBook Pro early 2011 running High Sierra (doesn't support Catalina). My mail app is constantly crashing even in middle of an email. I've erased the disk and reinstalled, turned off different mailboxes and deleted .plist and envelope files but nothing helps. Think it may be a rogue email but not sure. Don't know how to isolate it. Below is the detailed error message I get. Have another MacBook Pro in the family and doing the same but could be a shared email or is it something to do with old hardware/High Sierra? Any help really appreciated.
MacBook