Courier IMAP

What is Courier IMAP?

The Courier IMAP server is a high-performance, enterprise-grade IMAP server designed to efficiently manage large-scale email operations. Utilizing Maildirs, the server can easily handle hundreds of thousands of mail accounts, making it a reliable choice for email service providers. The built-in IMAP and POP3 aggregation proxy feature provides the Courier IMAP server with exceptional horizontal scalability, allowing a pool of servers to service initial client connections and seamlessly proxy to the appropriate server holding the mailbox data. This flexibility enables mail accounts to be easily moved between different servers, optimizing resource utilization

Highlights

• High-performance IMAP server capable of managing large-scale email operations
• Efficient handling of hundreds of thousands of mail accounts through the use of Maildirs
• Built-in IMAP and POP3 aggregation proxy for exceptional horizontal scalability
• Ability to proxy client connections to the appropriate server holding the mailbox data
• Flexibility to move mail accounts between different servers for optimized resource usage