Anubis SMTP email node GNU Anubis is an SMTP message submission daemon. It represents an intermediate layer between mail user agent (MUA) and mail transport agent (MTA), receiving messages from the MUA, applying to them a set of predefined changes and finally inserting modified messages into an MTA routing network. The set of changes applied to a message is configurable on a system-wide and per-user basis. The built-in configuration language used for defining sets of changes allows for considerable flexibility and is easily extensible. in Unix & Computingwith emailgnulinuxopensourcesmtp
OpenWebmail Open
WebMail is designed to manage very large mail folder files in a memory
efficient way. It also provides a range of features to help users
migrate smoothly from Microsoft Outlook to Open WebMail. Open WebMail in Webmaster > Toolswith emailsecuresoftwarewebmailby 2 users
Zimbra Email Software Zimbra
is open source server and client software for messaging and
collaboration - email, group calendaring, contacts, and web document
management and authoring. The Zimbra server is available for Linux, Mac
OS X, appliances, and virtualization platforms. Zimbra provides open source email and calendar groupware software, Zimbra is a popular choice for Linux and Mac OS X email servers and supports SaaS deployment, appliances and virtualization platforms. in Webmaster > Toolswith collaborativeemailopensoftwaresuiteby 26 users