sounds like a misconfigured sendmail. > Mar 19 01:30:04 openbsd sendmail: gethostbyaddr(IPv6:::1) > failed: 1 This is normal, you don't have ipv6 configured. > [127.0.0.1], reject=553 5.1.8 <root@openbsd>... Domain of sender > address root@openbsd does not exist check the domain... openbsd ? Configure sendmail with a fully qualified domain name. Good Luck Martin.