Has support for attachments and integrated LDAP functionality. Allows you to easily brand the pages with your logo. M-Store by MessagingDirect is a robust message server that delivers exceptional scalability, performance, and ease of operation. Features include a centrally managed, highly scalable universal message store accessible via IMAP4, POP3 or the web. Messages can be simultaneously accessed from several external processes.
Administration is performed locally, or remotely via a fully secure web administration tool.
N-Plex WebExpress by Critical Path, NT and Unix. It is designed to be simple to configure, secure, and easily extendable. NT and Unix. XWebMail by X and Mail. Perl AcmeMail by Leon Brocard AnyEmail by Netbula.