Hotmail, is a free electronic messaging founded in 1996 by Saber Bhatia and Jack Smith. In 1997 it was bought by the giant Microsoft and renamed first to MSN Hotmail and then to Outlook (actual name), to better fit with Microsoft’s product line. Hotmail was one of the first providers of email service and remains today one of the most popular.
Yahoo Mail is a free web email service developed by the American corporation Yahoo! Inc. in 1997. Estimate to be the third most popular email service, Yahoo Mail offers unlimited email storage capacity. 25Mb limit for attachments, filters and spam protection and SMTP and IMAP access. Totally redesigned in 2013, Yahoo Mail has nothing to envy to its two larger competitors.