Look for the 'Sender ID for E-Mail Specification License Agreement' here: http://www.microsoft.com/mscorp/ip/standards/
It's somewhere in the middle of that page. Read it carefully, specifically this portion: 2.2 Source Code Distribution. You also have a non-exclusive, royalty-free, nontransferable, non-sublicenseable, personal, license to distribute or otherwise disclose source code copies of such Licensed Implementation licensed in Section 2.1 only if You (i) prominently display the following notice in all copies of such source code, and (ii) distribute or disclose the source code only under a license that is placed in close proximity to the following notice and does not include any other terms that are inconsistent with, or would prohibit, the following notice: "This source code may incorporate intellectual property owned by Microsoft Corporation. Our provision of this source code does not include any licenses or any other rights to you under any Microsoft intellectual property. If you would like a license from Microsoft (e.g. brand, redistribute), you need to contact Microsoft directly." Ok... So that basically means NO OPEN SOURCE/FREE SOFTWARE LICENSE can be used for ANY implementation of SPF/SenderID. It is absolutely incompatible with the Open Source Definition, the Free Software Definition, and the Debian Free Software Guidelines. -- dido Te capiam, cuniculus sceleste! -- Philippine Linux Users' Group (PLUG) Mailing List [EMAIL PROTECTED] (#PLUG @ irc.free.net.ph) Official Website: http://plug.linux.org.ph Searchable Archives: http://marc.free.net.ph . To leave, go to http://lists.q-linux.com/mailman/listinfo/plug . Are you a Linux newbie? To join the newbie list, go to http://lists.q-linux.com/mailman/listinfo/ph-linux-newbie