Definitions for "Mail transfer agent"
Keywords:  mta, sendmail, openserver, admn, mmdf
a program that delivers electronic mail to other users on the system or to other machines on the network
A Mail Transfer Agent is like a postman for e-mails. They direct your e-mail by looking at the e-mail address.
A facility that accepts messages generated by an Mail User Agent, determines a route for delivery, edits the message header as required by the destination and delivery program, and calls the appropriate delivery program to deliver the mail. SCO OpenServer systems provide two MTAs: MMDF and sendmail(ADMN).