Benjamin: Thanks for responding. I guess that facility just does not exist in sendmail. I broke down and wrote a custom jilter (Java based milter) to do it. It is actually working very well and gives me a lot of flexibility. Thanks, Neil -- Neil Aggarwal, (832)245-7314, www.JAMMConsulting.com Eliminate junk email and reclaim your inbox. Visit http://www.spammilter.com for details.