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Apps with 'Exchange email' feature
Rackspace US, Inc. (NYSE: RAX) is an IT hosting company based in San Antonio, Texas. NikaMail is a portable, extendable, zero-config email server. It is designed to perform automation tasks, provide access to mailboxes (port 110), serve as a mail transfer agent (port 587) and mail exchange service (port 25). NikaMail supports TLS.