Mutt tries to open $MAIL (which is obviously /var/mail/grios), not "folder". The reason "it only happens with openbsd installed version" is probably that obsd didn't create /var/mail/$USER (which most other system do, imho).I guess it's just different design philosphies.
Probably just different design philosophies. On FreeBSD the adduser command (a Bourne shell script) creates the /var/mail/<username> file by default because it's (looks like) basically a wrapper around the 'pw adduser' command, which itself by default creates the user's file in /var/mail. The OpenBSD adduser and useradd commands don't create the /var/mail/<username> file by default. -Martin -- "Suburbia is where the developer bulldozes out the trees, then names the streets after them." --Bill Vaughan