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The primary function of an IMAP (Internet Message Access Protocol) server is to facilitate the storage and management of emails. IMAP allows users to access their emails from multiple devices while keeping the messages stored on the server. This means that any changes made—such as marking an email as read, moving it to a different folder, or deleting it—are reflected across all devices accessing that email account.

This capability is particularly advantageous for users who need to maintain a consistent and organized email experience across various devices, such as smartphones, tablets, and computers. Unlike protocols like POP3, which downloads emails to a single device and may remove them from the server, IMAP ensures that emails remain on the server and are easily manageable from any device.

Therefore, the focus of an IMAP server is indeed on storage and management, enabling seamless, real-time synchronization of email data across different platforms.