# Template Draft Files Set Headers

You can change the default header of your mail messages. That's a handy way to put in changes that you want made to the headers of all (or most) of the messages you send.

The first time you click the `Compose Message` button, xmh runs the MH comp command and reads a copy of the header that comp makes. (It actually runs `comp -file tempfile -nowhatnowproc -nodraftfolder` and gets a copy of `tempfile`.) It does the same kind of thing for the `Reply` and `Forward` commands.

By default, those MH commands read the template draft header files named components, replcomps, and forwcomps. To change the xmh draft header, you can change those template draft files.

For instance, if you make a components file like this:

        To:
        Reply-to: ehuser@asun.xxx.yyy.zzz
        cc:
        Fcc: outbox
        Subject:
        ---------

that's what the default fields in your composition window will look like when you use `Compose Message`.

Note that xmh only runs comp once per xmh session and saves the result. Therefore, if you change your components file, you'll need to restart xmh for the changes to take effect there. But xmh has to run the MH repl and forw commands before each message that you reply to or forward. Your changes to replcomps and forwcomps take effect right away.