MDIR(6) MDIR(6)
NAME
mdir - mail directory format
SYNOPSIS
The mdir format is used by Upas as a replacement for tradi-
tion mailbox format. An mdir mailbox is a directory con-
taining any number of messages stored one message per file.
Individual messages are stored in the same format they would
be in a traditional mailbox; each message is a valid mailbox
with a single message. The message files are named with the
UNIX seconds corresponding to the date on the `From' line, a
“.” separator and a two digit sequence starting with `00'.
One mdir may contain other mdirs but (currently) this rela-
tionship is in name only. The mail box /mail/box/a does not
contain any messages from /mail/box/a/b, according to
upasfs(4).
SEE ALSO
splitmbox(8), upasfs(4)
Page 1 Plan 9 (printed 10/30/25)