Email is very useful for us. Almost everybody has an email address who use internet. We can send pdf files, photos etc through email.
Yahoo is very popular for mailing service and very old also. I have one account in yahoo and another in gmail.
But I like gmail. Yahoo mail is very slow. Their login process is awful. Gmail has better login process and fast also. Yahoo mail security is nothing in front of gmail. Gmail has many security options. The user interface of gmail is better then yahoo mail. Yahoo mail looks very old and outdated. I also notice that yahoo mail consumes more data then gmail. Nowdays everybody prefers to use gmail because of its features and security. I also prefers everybody to use gmail rather than yahoo mail.