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MFLOW(1) General Commands Manual MFLOW(1)

reflow format=flowed plain text messages

mflow [-f] [-q] [-w width] < file

mflow reformats the standard input according to the rules of RFC 3676. PIPE_CONTENTTYPE is inspected, making this a suitable filter for ‘text/plain’ messages for mshow(1). Messages not specified as ‘format=flowed’ are output unchanged.

Text is reflowed (where allowed) to fit the width given in the environment variable COLUMNS, the terminal width, or 80 characters by default.

If defined, the environment variable MAXCOLUMNS specifies the maximum line length.

The options are as follows:

Force wrapping of long lines.
Prefix lines with ‘>’. Can be used multiple times.
Set maximum line length to width.

The mflow utility exits 0 on success, and >0 if an error occurs.


R. Gellens, The Text/Plain Format and DelSp Parameters, RFC 3676, February 2004.

Leah Neukirchen <>

mflow is in the public domain.

To the extent possible under law, the creator of this work has waived all copyright and related or neighboring rights to this work.

September 6, 2017 x86_64