Mail client
Also called: e-mail program, mail program or Mail User Agent(MUA)
A mail client is a computer program that can be used to receive and send e-mail. The software can be installed on the user's computer, tablet or smartphone, or be located on the email provider's server.
When the mail client is a web application that opens within a browser, it is called webmail.
Examples of local e-mail programs include Microsoft Outlook and Mozilla Thunderbird.