An email client is a computer program that is used to read and send email. There are two types of email client s.
Web Based Email Client
Here you can access your email account by accessing web
Advantages
No need to install client software on client's computer and configure with the mail server
Can access the email account online from any computer connected to the internet.
Let free access.
Disadvantages
To signup have to submit your personal details.
You have to share lot adds.
Less security.
Stand Alone Email Client
Here you do not need to access web. You need a special client application such as Outlook Express, Eudora, Thunderbird.
Advantages
Internet connection is not necessary.
Disadvantages
Have to install the e-mail client application on client's computer and configure it with mail server.
Usually cannot access email from other computers