JFTR, default_mailer_format has no (longer) %S in it since:
| --unoff BETA release 961203 -- | | 231) Roland Rosenfeld <[email protected]> | ADD. changed default_mailer_format to "%M -t < %F" That changed once more long ago to the current default setting of "%M -oi -t < %F" where %M is ${MAILER:-"/usr/lib/sendmail"} and %F the name of the file holding the full (ready to sent) article. %S (and others like %T) are still available (mainly to be used with interactive_mailer=2). Existing settings in tinrc (from ancient versions) with %S in it were NOT changed/updated automatically.
