All mail is routed directly into the program for instant delivery. We have used Gossamer Mail on a system with 70,000 users without any problems. The program comes as two files, an install file and a data file. It will guide you through the setup process from start to finish. No more editing of any configuration files.
Users can add new addresses into their own address book in two clicks.
They can use the quick search to easily view an address. They can give each address a nickname for quickly sending a message to a user. User can store one or more signatures that will get added automatically to any outgoing message. User can set up one or more filters to automatically route incoming email to a specific folder, or automatically delete incoming mail. Change almost any aspect of your install from your admin panel.