Often referred to as an e-mail server, a device and/or program that routes an e-mail to the correct destination. Mail relays are typically used within local networks to transmit e-mails among local users. (For example, all of the student and faculty e-mail of a college campus.) Mail relays are particularly useful in e-mail aliasing where multiple e-mail addresses are used but the mail relay forwards all messages to the specified e-mail addresses to one single address.
A mail relay is different than an open relay, where an e-mail server processes a mail message that that neither originates or ends with a user that is within the server��s local domain (i.e., local IP range).
Stay up to date on the latest developments in Internet terminology with a free weekly newsletter from Webopedia. Join to subscribe now.
Webopedia's student apps roundup will help you to better organize your class schedule and stay on top of assignments and homework. Read More »20 Ways to Shorten a URL
If you need to shorten a long URL try this list of 20 free online redirection services. Read More »Top 10 Tech Terms of 2015
The most popular Webopedia definitions of 2015. Read More »
This Webopedia study guide describes the different parts of a computer system and their relations. Read More »Network Fundamentals Study Guide
Networking fundamentals teaches the building blocks of modern network design. Learn different types of networks, concepts, architecture and... Read More »The Five Generations of Computers
Learn about each of the five generations of computers and major technology developments that have led to the current devices that we use today. Read More »