Hi, What is the correct lock type to use for RHEL3 with sendmail (sendmail-8.12.11-4.RHEL3.6) and Mailscanner 4.66.5 ? The doc say sendmail <= 8.12 --> flock, sendmail > 8.12 --> posix. Redhat is porting a lot of stuff from higher version tree's, don't know about sendmail though. Jens