A free program for Android, by Mail.Ru Group.
Mail.ru is a free application for Android smartphones and tablets that enables you to access all your email accounts from a single application.
This tool allows you to read all of your emails from different accounts and also send emails from your Android device. It has a simple and clean interface. It supports multiple services, such as Gmail, Yahoo, Hotmail, etc.
You can choose to receive push notifications for new messages, set a time to receive notifications, and choose which folders you want to receive notifications for.
You can also create an avatar for your email account and use it as a way to more easily identify who is contacting you.