I'm using osx mail with a pop account (need for my workflow).


  • when mail opens and checks the a specific pop account mail crashes. It's only this specific account. Other pop accounts work.

Troubleshooting: that didn't work

  • I have deleted and re-added the account. Which resolved the issue but after a few months the issue occurred again then i have to redownload all my messages again and sort through them to get back to where I was which is time consuming.
  • ~/Library/Mail/V6/MailData removed "Envelope Index" to allow the reimport to occur again. issue still occurs
  • Talked to the mail provider and everything checks out fine with the account
  • have thunderbird configured but this issue doesn't occur on thunderbird (suspect osx mail client)


  • It seems like
  • suggestion: keep the Console.app open while launching Mail and check for the errors that happens in the system... could give a hint at what is really happening (my guess: a bad-formatted/too-big message - and yes, usually thunderbird is more resilient) Dec 5, 2019 at 23:44
  • thanks for the suggestion. I think that might be another approach to troubleshoot it further.
    – Lacer
    Dec 6, 2019 at 0:22

1 Answer 1


Ok the issue was that I sent an email using the pop account to itself and for some reason osx mail couldn't handle it and would keep crashing trying to download that email. So I used my iPhone to access the mail through IMAP looked at the other emails from the last email that I received on my computer and process of elimination deleted those subsequent emails until i found the offending email.

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