I have a standalone test FC5 box running sendmail. I yum install milter-greylist...went through the docs and found I need to add INPUT_MAIL_FILTER(`greylist', `S=local:/var/run/milter-greylist/milter-greylist.sock') define(`confMILTER_MACROS_CONNECT', `j, {if_addr}') define(`confMILTER_MACROS_HELO', `{verify}, {cert_subject}') define(`confMILTER_MACROS_ENVFROM', `i, {auth_authen}') define(`confMILTER_MACROS_ENVRCPT', `{greylist}') to my sendmail.m4 and rebuild. I started /usr/sbin/milter-greylist. I restarted sendmail 'service restart sendmail' (after rebuilding with webmin interface) and in my system log error messages I get Oct 10 15:21:13 localhost sendmail[1955]: sql_select option missing Oct 10 15:21:13 localhost sendmail[1955]: auxpropfunc error no mechanism available Any comments or suggestions? Again, at this point it's just a dumb test box with the 'default' sendmail.m4 file. All I want to do is play with milter-greylist a bit before I try and deploy it on a server.