Masquerade sender domain (rewrite) on sendmail

I've worked like DBA 2.0 a long time.

So, I have been System Administrator in the same time. I think this a good way for me, Becuase I like it and happy ;)

I'd like to write idea to configure "masquerade sender domain" on sendmail MTA.  

Masquerade sender domain (rewrite) on sendmail??? 

why i had to do like that ... configure sendmail (Because some MTA servers, that check look up domain), 

My sender was "oracle@db01.domain.com"... 

DNS Servers on the world know "domain.com", But don't know "db01.domain.com"

Start...

- modified "sendmail.mc" file in /etc/mail PATH

FEATURE(masquerade_envelope)dnl

FEATURE(genericstable, 'hash -o /etc/mail/genericstable')dnl

FEATURE(generics_entire_domain)dnl

GENERICS_DOMAIN('domain.com')dnl

- use m4 to make new sendmail.cf (backup sendmail.cf file before)

$ m4 /etc/mail/sendmail.mc > /etc/mail/sendmail.cf

- created "genericstable" file in /etc/mail PATH

Example in genericstable file:

@db01.domain.com      %1@domain.com

that mean, every senders (%@dba01.domain.com) were masqueraded %@domain.com

- makemap genericstable file...

$ makemap -r hash /etc/mail/genericstable.db <  /etc/mail/genericstable

- restarted sendmail... (hope no error)

$ /etc/init.d/sendmail   restart

- Tested and checked..., recipients should see senders be "%@domain.com", when sender were db01.domain.com domain  on mail client.

when check header email:

Return-Path:

Delivered-To: recipient@domain.com

Received: (qmail 20395 invoked from network); 13 Mar 2009 12:32:37 +0700

Received: from ... (HELO mxlocal) 

          (envelope-sender )

          by mailrelay ) with SMTP

          for ; 13 Mar 2009 12:32:37 +0700

.

.

.

Received: from db01.domain.com

by MTA_server (8.13.1/8.13.1) with ESMTP id n2D5Wbal017581

for ; Fri, 13 Mar 2009 12:32:37 +0700

Received: (from oracle@localhost)

by db01.domain.com (8.13.1/8.13.1/Submit) id n2D5Wa6G016663

for recipient@domain.com; Fri, 13 Mar 2009 12:32:36 +0700

From: oracle@domain.com