Heads up sendmail users. After running the big pile of upgrades over the weekend I have noted a change in behavior in sendmail. The current running version is sendmail-8.13.1-3.2.el4. Specifically sendmail started ignoring the relay by IP rules in the access / access.db files. they were formatted as such (IP addresses changed for privacy) 192.168.0.0/27 RELAY After a bunch of testing with sendmail -bt I discovered that the behavior had reverted to the old school style of access that does not allow for CIDR notation thus: 192.168.0 RELAY The purpose of the sendmail patch was to fix a hole where an outside user posing as localhost.localdomain could relay. This is a rule related to access / access.db. I am theorizing that the developers reverted that part of the code back to an older version. Is anyone else noticing this? I may be way off in my assumtions. However, I'm not a coder and have to work off of trial and error when troubleshooting. Was the sendmail upgrade part of the 4.5 push? Regards, James