E-mail
Short for electronic mail, e-mail is text messages and/or files, images or other types of attachments sent through a network to a specified individual or group of individuals. Below is an example and breakdown of an Internet e-mail address.
support@computerhope.com
The first portion all e-mail addresses is the alias, user, group, and/or department of a company. In our above example "Support" is the department at Computer Hope.
Next, the "@" is used as a divider in the e-mail address and is always required for all SMTP e-mail addresses.
Finally, "computerhope.com" is the domain name of where the user belongs. Many times a user that owns their own domain name will also own their own web page and curious users can type the domain name in their browser to look at that user's web page.
Users can send and receive e-mail messages either through an e-mail program such as Microsoft Outlook or through an online e-mail service or webmail such as Hotmail or Gmail.
Are e-mail addresses case sensitive?
Typically most Internet Service Providers (ISPs) and e-mail servers are not case sensitive, which means for example SUPPORT@computerhope.com is the same as support@computerhope.com. However, the first portion of the e-mail address (alias/username/group) can be case sensitive. This means if the server has case sensitive logins SUPPORT, Support, support, and SUPport would all be considered different users and each of those users would have different e-mail addresses.