Thanks for replying Bill,
I have had good luck with RBL lookups. I carefully selected those that I believe have an adequate control process for reporting spam. I also want ordb lookups to block email from known open relays. I looked at the links you sent, but I have not found any info describing the syntax to have mailfront do rbl lookups. One option maybe the rblsmtpd program.
If necessary, I will not upgrade SME at this time. With spam being such a problem, I will wait until rbl lookup is added to SME or possibly look at using Redhat for a mail server. Anyone know if mailfront can easily be removed and replaced with obtuse-smptd on 5.6?
Another issue I have to deal with is I currently masq IPSEC 50 and 500 through SME 5.1.2. As of right now, no modules have been written to allow the new kernel/iptables to do this.
Thanks again,
ryan