Definition: A program running at Internet Service Providers and large sites constantly connected to the Internet used to transport mail. Users normally do not interact with email servers: email is submited with an email client to an email server, which delivers it to the recipient's email client.
The most widely used email server is sendmail.
Also Known As: Mail Transport Agent, MTA, Mail Transfer Agent
Alternate Spellings: E-mail Server
Email servers for all platforms.