Software for creating, sending, receiving and organizing electronic mail, or email. Modern desktop email clients like Microsoft Outlook, Windows Live Mail and Mozilla Thunderbird offer advanced features for managing email, including WYSIWYG editors for composing email messages, anti-spam and anti-phishing security protection, advanced search capabilities, and rules and filters for more efficiently handling and organizing messages and email folders.
A large number of online email services, called webmail, exist with features and functionality for managing e-mail similar to their desktop email software counterparts. Some of the more popular online email services are Yahoo! Mail, Gmail, Hotmail (Windows Live Mail) and AOL Mail.