In this day and age, it is not possible to imagine any business environment without email messages. One aspect of setting up an email server for your company that is often overlooked is the selection of your mail transfer agent (MTA). MTA is also an abbreviation for mail transport agent or message transfer agent. No matter what you call it, an MTA plays an important role in everyday mail communication. An MTA is software that is responsible for transferring your electronic mail messages to the correct mail server, which an MTA finds by querying the MX records of the recipient.