http://blogs.technet.com/sbs/archive/2008/11/14/how-sbs-2008-configures-your-spf-record.aspx[Today's post comes to us courtesy of Wayne McIntyre] As many are already aware, Microsoft and other industry leaders introduced sender ID filtering to assist in the combat against e-mail spam. Basically the concept of sender ID filtering is to verifyen-USCommunityServer 2.1 SP1 (Build: 61025.2)http://blogs.technet.com/sbs/archive/2008/11/14/how-sbs-2008-configures-your-spf-record.aspx#3153818Sat, 15 Nov 2008 11:15:14 GMTd5e57398-b9ef-4490-9955-07cbb4e4a80d:3153818SPF Record configuration in SBS 2008<p>PingBack from <a rel="nofollow" target="_new" href="http://www.ditii.com/2008/11/15/spf-record-configuration-in-sbs-2008/">http://www.ditii.com/2008/11/15/spf-record-configuration-in-sbs-2008/</a></p>