Yahoo! Mail
Yahoo! Mail is an email service launched in 1997 through the American parent company Yahoo!. Yahoo Mail provides four different email plans: three for personal use (Basic, Plus, and Ad Free) and another for businesses. By December 2011, Yahoo! Mail had 281 million users, making it the third largest web-based email service in the world. Since 2015 its webmail client also supports managing non-Yahoo e-mail accounts.
MCI Mail
The MCI Mail service was launched on September 23, 1983, in Washington, D.C., during a press conference that was hosted by MCI's founder and Chairman, William G. McGowan. MCI Mail was the first commercial email service to use the internet. The service was officially decommissioned by MCI at 11:59 p.m. ET on June 30, 2003.