mh-scan-destination-width

mh-scan-destination-width is a variable defined in `mh-scan.el'.
Its value is

1

Documentation:
Number of columns consumed by the destination field in `mh-scan-format'.

This column will have one of " ", "%", "-", "t", "c", "b", or "n"
in it.

" " blank space is the default character.
"%" indicates that the message in a named MH sequence.
"-" indicates that the message has been annotated with a replied field.
"t" indicates that the message contains mymbox in the To: field.
"c" indicates that the message contains mymbox in the Cc: field.
"b" indicates that the message contains mymbox in the Bcc: field.
"n" indicates that the message contains a Newsgroups: field.