Create thauvin.mc in /usr/share/sendmail-cf/cf with:

undefine(`ALIAS_FILE')dnl
include(`../m4/cf.m4')dnl
VERSIONID(`$Id$')dnl

MASQUERADE_AS(thauvin.net)dnl
FEATURE(smrsh, `/usr/sbin/smrsh')dnl
FEATURE(`nouucp', `reject')dnl
FEATURE(allmasquerade)dnl
FEATURE(masquerade_envelope)dnl
FEATURE(`access_db', `hash -T<TMPF> /etc/mail/access')dnl
FEATURE(`delay_checks')dnl
OSTYPE(linux)dnl
DOMAIN(thauvin)dnl

define(`LOCAL_RELAY', `nix.thauvin.net')dnl
define(`MAIL_HUB', `nix.thauvin.net')dnl
define(`confCOPY_ERRORS_TO', `Postmaster')dnl
define(`confMAX_HOP', `30')dnl
define(`confQUEUE_LA', `8')dnl
define(`confREFUSE_LA', `12')dnl
define(`confDEF_USER_ID', 21:21)dnl
define(`confMAX_MESSAGE_SIZE', `5242880')dnl
define(`confTIME_ZONE', `USE_SYSTEM')dnl
define(`confHOSTS_FILE', `/etc/hosts')dnl
define(`confSAFE_QUEUE', `True')dnl
define(`confCHECKPOINT_INTERVAL', `10')dnl
define(`confSAVE_FROM_LINES', `False')dnl
define(`confMATCH_GECOS', `False')dnl
define(`confFORWARD_PATH', `$z/.forward')dnl
define(`confCHECK_ALIASES', `True')dnl
define(`confPRIVACY_FLAGS', `goaway')dnl

Create thauvin.m4 in /usr/share/sendmail-cf/domain with:

divert(0)
VERSIONID(`$Id$')
define(`BITNET_RELAY', `relay1.uu.net')dnl
define(`LOCAL_RELAY', `nix.thauvin.net')dnl
FEATURE(redirect)dnl
FEATURE(use_cw_file)dnl
FEATURE(always_add_domain)dnl
MAILER(`local')dnl
MAILER(`smtp')dnl

In /usr/share/sendmail-cf/cf execute:

m4 thauvin.mc >! /etc/mail/sendmail.cf