Latest revision as of 00:24, 20 January 2026

Mail Transfer Agent (MTA)

A program running on a mail server that receives messages from mail user agents or other MTAs and either forwards them to another MTA or, if the recipient is on the MTA, delivers the message to the local delivery agent (LDA) for delivery to the recipient. Common MTAs include Microsoft Exchange and sendmail.

Source: NIST SP 800-45 Version 2 | Category:

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