rmail pop error [was Re: undigestify is fooled by messages containing lines of dashes]

[Glenn Morris]

Tim Hesterberg wrote:

> I start emacs using -no-init-file, then run
> (prog1
>   (setenv "MAILHOST" "sewinexch00.insightful.com")  ; 7/10/06
>   (setq rmail-primary-inbox-list '("po:timh") 
>       rmail-pop-password-required t)
> )
> before M-x rmail
> On both systems it asks for my POP Password, and on 22.1.1 proceeds
> to read the mail from the server into my RMAIL file.  On 22.1.90
> I get a message
>       Wrong type argument: stringp, nil
>
> The *Messages* buffer contains:
> Loading rmail...done
> Counting messages...done
> Getting mail from the remote server ...
> apply: Wrong type argument: stringp, nil


Please do M-x toggle-debug-on-error, provoke the error again, and post
the backtrace.

What are the values of rmail-movemail-program and
rmail-movemail-variant-in-use after you get the error?

What does (rmail-autodetect) return?

Is there a `movemail' executable in exec-directory or exec-path, and
do you have permission to run it? What does `movemail --version' output?