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