Apple Mail under Big Sur: constantly "NSIRD_Mail_####" folders in trash on system boot

Hello sterling r,

Thank you for your assistance.

The linked Apple Support document is already known to me as I’m encountering the described issue since Mojave.

I also know that this is a minor issue and I just have to empty trash to get rid of these folders, but I would really like to know why Apple Mail is the only email application (amongst all that I’ve tried during the last couple of months) which produces these folders.

And it isn’t a „crash related“ issue or similar, it is rather a unique Apple Mail „feature“ during normal use of the application (on my system).

I do like working with Apple Mail, as it offers good possibilities to filter and bundle emails when working with multiple accounts and aliases aso.

But this issue carries potential to disappoint in the long run and therefore I decided to post here to probably get a solution or at least an insight why Mail does not seem to be able to handle its temporary files as one would expect (or as other apps do).

(Rebuilding the accounts, deleting the accounts and setting them up freshly did never help btw.)

Thanks again for your efforts,

cheers

Hello bailier,

thank you for your reply on my „Apple Mail issue“.

I honestly can hardly imagine that this should be expected behaviour.

(In my experience, Temp files from applications only become visible when something „went wrong“ before).

So I think I will place a bug report on this and will continue to evaluate some other email clients in the meantime.

Thanks again for your efforts!

Cheers, R.Simon