Desktop-based email programs vs. webmail
A Desktop-based email program uses software installed on your local computer.
Software program examples: Outlook, Thunderbird
Webmail requires the user to access a website online.
Examples: Gmail, Hotmail, Windows Mail
See the posts below for definitions and comparisons:
What Is the Difference Between Webmail and Email?
How are mobile, desktop and webmail categories defined?
What are the Pros and Cons of Web-based Email Over Desktop Email?