James v2 is the current release of James, supporting Apache Mailet API v2 (MailetAPI). We anticipate incremental, but no major changes to this release. JamesV2 holds current notes for James v2.
James v3 is the next major development of James. We anticipate significant changes in the core code, replacing database layers, internal interfaces, Mailet API v3 support (JamesMailetV3), and other changes. JamesV3 holds current notes for James v3.
Protocols:
SMTP POP3 NNTP IMAP Jabber