JeguePanel is a panel to provide easy management of GNU/Linux servers. It makes services configuration (email and samba) much more easy and efficient, and handles user and permissions management. It's integrated with monitoring tools and a lot of control programs like anti-virus, anti-spam, reports, etc. It has English, Portuguese, and Spanish translations. It can use OpenLDAP, PostgreSQL, or MySQL as a backend, and has full integration with Active Directory. It will show different interfaces to users based on permission levels.
Qubit (Qmail Ultimate Backend Integration Tool) is a fully Web-based qmail server configuration and administration suite. It is based on the qmailrules qmail server installation style. It has the same features as other similar tools (like vqadmin and qmailadmin), and it also gives you full control to administer your server with all sorts of features and applications.
lib_MTA is a BASH function library for dealing with email. It provides support for unencrypted and TLS-encrypted relaying of email with attachments, special mailing list filtering, and From address spoofing. The installation automatically sets up a mailing list filtering infrastructure that can be enabled with a few simple steps. Example scripts for relaying email and filtering mailing lists are included in the package with the library. Desktop users can employee a simple script to send email to remote addresses without the need for a local MTA, provided they have relay access via Gmail or their ISP.
Logsend is a Unix daemon for email notification of log file changes, having 3 different backends. It watches the log files and periodically mails you the additions (being able to filter them). Logsend comes with a dialog-based configuration tool, as well as a live monitor that allows the users to watch the changes in real time.