[IMail Forum] which ones need to be blacked holes in these headers

[Sales]

these are some headers from spam. was wondering if i should block the last ip or the first (the ones i made bold) or both ? would like to make suer i am block the right ips and doing it right.
thanks
mark
X-Persona: <webdude>
Received: from netease.com [202.103.134.10] by fiber-net.com
  (SMTPD32-5.05) id A973AF240146; Sun, 14 Nov 1999 13:03:31 -0500
Received: (fmail 13454 invoked from network); 15 Nov 1999 02:38:04 -0000
Received: from unknown (HELO default) (202.96.184.116)
  by 202.103.134.10 with SMTP; 15 Nov 1999 02:38:04 -0000
From:      <[EMAIL PROTECTED]>
To:        <[EMAIL PROTECTED]>

another one:
X-Persona: <techsupport>
Received: from dns1 [148.233.18.242] by fiber-net.com
  (SMTPD32-5.05) id A0538F170142; Fri, 12 Nov 1999 19:26:59 -0500
Received: from 150.42.2.6 by dns1 (SMI-8.6/SMI-SVR4)
        id RAA22810; Fri, 12 Nov 1999 17:22:40 -0700
Subject: *** Get More Orders For Anything You Sell     ***                                   aaa -kiujomoibi
X-Mailer: magical mail type 2
To:
From: [EMAIL PROTECTED]

and one more:
>Received: from umb.edu.co [200.31.20.130] by fiber-net.com
>  (SMTPD32-5.05) id AABE972300F8; Sun, 07 Nov 1999 04:47:42 -0500
>Received: from tcs.co.in by umb.edu.co (SMI-8.6/SMI-SVR4)
>       id EAA21398; Sun, 7 Nov 1999 04:35:13 +0500
>From: [EMAIL PROTECTED]