mh-scan-format-file

mh-scan-format-file is a variable defined in `mh-e.el'.
Its value is

t

Documentation:
Specifies the format file to pass to the scan program.

The default setting for this option is "Use MH-E scan Format". This
means that the format string will be taken from the either
`mh-scan-format-mh' or `mh-scan-format-nmh' depending on whether MH or
nmh (or GNU mailutils MH) is in use. This setting also enables you to
turn on the `mh-adaptive-cmd-note-flag' option.

You can also set this option to "Use Default scan Format" to get the
same output as you would get if you ran "scan" from the shell. If
you have a format file that you want MH-E to use but not MH, you can
set this option to "Specify a scan Format File" and enter the name
of your format file.

If you change the format of the scan lines you'll need to tell MH-E
how to parse the new format. As you will see, quite a lot of variables
are involved to do that. Use "M-x apropos RET mh-scan.*regexp" to
obtain a list of these variables. You will also have to call
`mh-set-cmd-note' if your notations are not in column 4 (columns in
Emacs start with 0).

You can customize this variable.

This variable was introduced, or its default value was changed, in version 6.0 of the MH-E package that is part of Emacs 22.1.