Spam Rank Alert is a tool to help aid in knowing if your network is infected with malware or if you have an open SMTP relay. SRA is a bash script that will check your mailing domains senderbase.org score, and send alerts based upon a set threshold.
mx-LDAP-Suite
mx-LDAP-vacation: auto responses mail on vacation and reads the message from LDAP.
mx-LDAP-admin:Is a PHP based tool. It provides administration of LDAP-Directories
(Add, modify and delete user-accounts,groups,aliases,
samba-workstat