jMailComposer is a Servlet/JSP component that allows to send emails from web browser. It supports to, replyto, cc, bcc email addresses and personal names. It provides message priority, return-receipt and file attachments. jMailComposer JSP files could be customized to your own web design and language. You could also include custom fields coming from HTML form into email message. An add-ons section including a Multilanguage Pack (with chinese sample).
Saké Mail is a very high performance Web-based email system, designed for scaling to large numbers of concurrent users. It takes advantage of the Java Servlet API's memory-resident architecture and multi-threading HTTP response model. It avoids file system accesses through memory caching at every possible point, and never needs to touch the file system at runtime at all if coupled with an IMAP server. It supports POP3, IMAP, and SMTP, including authenticated SMTP. It also provides an extremely sophisticated message rendering system that can easily handle even complex HTML encoded messages with attachments that have been forwarded multiple times.
It is a Java servlet allows you to support web-based mail service including mail-lists. So all mail (private, and mail lists) will be saved and distributed within your server. This servlet offers user interface to read/send mail, create and maintain mail lists etc.