I have multiple domains on one server and when sending email to server, which supports TLS, server changes FROM field to default domain ($j). What should i do (in .mc level please) to remain original domain unchanged (all domains are qualified)?

There is excerpt from logs, where it is displayed the problem:
Jul 14 10:59:16 server sendmail[19537]: p6E7xGt3019537: from=user@domain-a.com, size=491, class=0, nrcpts=1, msgid=<1310630356.19535@domain-a.com>, relay=loggedinuser@localhost
Jul 14 10:59:17 server sendmail[19538]: STARTTLS=server, relay=localhost.localdomain [127.0.0.1], version=TLSv1/SSLv3, verify=NOT, cipher=DHE-RSA-AES256-SHA, bits=256/256
Jul 14 10:59:17 server sendmail[19537]: STARTTLS=client, relay=[127.0.0.1], version=TLSv1/SSLv3, verify=FAIL, cipher=DHE-RSA-AES256-SHA, bits=256/256
AT THIS POINT from ADDRESS HAS BEEN CHANGED:
Jul 14 10:59:17 server sendmail[19538]: p6E7xG06019538:from=<user@domain-b.com>, size=607, class=0, nrcpts=1,msgid=<1310630356.19535@domain-a.com>, proto=ESMTP, daemon=MTA,relay=localhost.localdomain [127.0.0.1]
Jul 14 10:59:18 server sendmail[19537]: p6E7xGt3019537:to=recepient@domain-c.com, ctladdr=user@domain-a.com (1005/100),delay=00:00:02, xdelay=00:00:02, mailer=relay, pri=30491,
relay=[127.0.0.1] [127.0.0.1], dsn=2.0.0, stat=Sent (p6E7xG06019538 Message accepted for delivery)
Jul 14 10:59:18 server sendmail[19540]: STARTTLS=client,relay=smtp3.domain-c.com., version=TLSv1/SSLv3, verify=FAIL,cipher=DHE-RSA-AES256-SHA, bits=256/256
Jul 14 10:59:18 server sendmail[19540]: p6E7xG06019538:to=<recepient@domain-c.com>, ctladdr=<user@domain-b.com> (1005/100),delay=00:00:01, xdelay=00:00:00, mailer=esmtp, pri=120607,
relay=smtp3.domain-c.com. [93.40.95.67], dsn=2.0.0, stat=Sent (Ok:queued as 2117414003)