Apache James
A modular, enterprise-grade open-source mail server written in Java, supporting SMTP, IMAP, POP3, JMAP, and ManageSieve protocols with pluggable storage backends.
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Apache James (Java Apache Mail Enterprise Server) is a fully open-source, enterprise-grade mail server built entirely in Java. It provides a complete, modular platform for sending, receiving, and processing email using industry-standard protocols. James runs on the JVM and offers…