How do I configure the Mail Transport Agent (MTA) in Red Hat Enterprise Linux?

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A Mail Transport Agent (MTA) is essential for sending email. A Mail User Agent (MUA) such as Evolution, Mozilla Mail, and Mutt, is used to read and compose email. When a user sends an email from an MUA, the messages are handed off to the MTA, which sends the message to a series of MTAs until it reaches its destination.

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