Understood. Hmm, just tried mutt again and it can not delete files, telling me, that "temporary files can not be written" in /var/mail.
So it looks more that the file and directory permissions are set correctly, and that means -> I have to take a look at mutt. Easiest way, just uninstall and reinstall, then check. If this does not work, looking at permissions of mutt or similar. I will tell more as soon as I know. Best Hans > > OK. The problem is you have some directory where users are > supposed to be able to create a file, but to only remove > *their* files, but not other's. > > This is a well-known problem (/tmp also has that problem), and > UNIX-like file systems have something for that. This is called > the "sticky bit" [1]. > > And lo and behold, *my* /var/mail has this sticky bit: > | tomas@trotzki:~$ ls -al /var/mail > | total 220 > | drwxrwsr-x 2 root mail 4096 Feb 25 15:30 . > > ^ Here it is > > | drwxr-xr-x 13 root root 4096 Oct 30 2017 .. > | -rw-rw---- 1 tomas mail 209515 Feb 25 15:30 tomas > > I don't know why yours has lost it. Unless there's a newfangled > thing going on. One never knows, these days ;-) > > Cheers > - t