[Mailman-i18n] set charset in outgoing Mailman messages

[Josh Zlatin-Amishav]

I translated a few of the Mailman subscripe and unsubscribe
text files to Hebrew. I tried to add Hebrew (iso-8859-8-1) support by adding 
the following line to Defaults.py
add_language('he',    _('Hebrew'),              'iso-8859-8-1')

and I even tried setting the default language to Hebrew in mm_cfg.py
DEFAULT_SERVER_LANGUAGE = 'he'

but the messages sent by Mailman still do not set the charset correctly. I
looked at http://www.list.org/i18n.html for more specific instructions
but could not find any. Can someone point me in the right direction to
configure Mailman to set the charset for outgoing Mailman messages to 
iso-8859-8-1.

Thank you,

--
  - Josh