Re: rmail invalid mbox file

[Eli Zaretskii]

> From: Jim Erickson <jimerickso@gmail.com>
> Date: Tue, 4 May 2021 18:31:37 -0500
> 
> i am using rmail in emacs 27.2 on openbsd 6.9 on raspberrypi 4B 8gb
> aarch64. i use fetchmail and procmail to deliver my gmail to
> /home/jim/RMAIL. all rmail settings are at standard defaults. when i
> try to open rmail to process my gmail it says the following:
> 
> Debugger entered--Lisp error: (error "Invalid mbox file")
>   signal(error ("Invalid mbox file"))
>   error("Invalid mbox file")
>   rmail-convert-file-maybe()
>   rmail()
>   funcall-interactively(rmail)
>   call-interactively(rmail)
>   menu-bar-read-mail()
>   funcall-interactively(menu-bar-read-mail)
>   call-interactively(menu-bar-read-mail nil nil)
>   command-execute(menu-bar-read-mail)
> 
> i am using the standard RMAIL file formed by receiving mail through
> fetchmail + procmail. can anyone tell me how to form a valid mbox file
> so i can use rmail to process and read my gmail?

Can you show the first line of that mbox file?