In addition to the default header lines that are included in a mail message you create, you can add mail header lines to your outgoing mail by defining them in a personal header configuration file in $HOME/.odtpref/ScoMail.hdrs.
A header configuration file consists of one or more entries,
one entry per additional header.
The format of each entry is:
header required default_value
The fields are separated by tab characters. The header field indicates the name of the header, for example, Keyword or Priority.
The required field is optional and indicates whether the header line should be included in outgoing messages even if it includes no text. Values for required can be 0, for not required, or 1, for required (header will be included even if it includes text).
If required is specified, the optional default_value field can indicate text that Mail will include automatically when you create a message.
A system-wide header configuration file can be maintained in /usr/lib/scomail/ScoMail.hdrs. If a ScoMail.hdrs file is present in your in $HOME/.odtpref directory, the system-wide file is ignored.