Re: Rmail does not mark buffer modified when unread message is shown

[Eli Zaretskii]

> From: Göktuğ Kayaalp <self@gkayaalp.com>
> Date: Sun, 06 May 2018 00:02:47 +0300
> 
> I'm considering a switch to Rmail from Gnus.  I've converted my nnml
> boxes to mboxes using a couple python scripts [1], and am fetching new
> mail via mpop. My Rmail configuraiton is found below. When browsing the
> Rmail buffer, after viewing unseen messages, the buffer is not marked
> modified, and neither ‘s’ nor ‘C-x C-s’ save anythign.  When I look at
> the Rmail header in the mbox itself, I see that the unseen attribute is
> not changed, it is always U (understandably given I can't save the
> buffer).  The only way to actually preserve the changes is to manually
> toggle the buffer modified bit and hitting ‘s’.  What is going wrong?
> BTW I've narrowed the problem down to the last two ifs in
> ‘rmail-set-attribute’, the then branch of the outer one is executed for
> a reason that IDK.  And I've used Rmail with mpop before without
> problems.

If you start Emacs as "emacs -Q" and then invoke "C-u M-x rmail RET"
on an mbox file, do the problems go away?  For this experiment, please
try an mbox file that wasn't converted as you described, but came from
somewhere else, for example from the archives of this list.