Providing unseen message count across devices

Embodiments are directed to providing an indication of unseen email messages to a mobile device user, to establish an unseen email message count and to maintain a consistent unseen email message countacross multiple mobile devices. In one scenario, a computer system receives subscription data that subscribes a user to email push notifications. The subscription data includes a token ID and a timestamp. The computer system determines that a new email message has arrived at the user's inbox and accesses the user's email inbox to determine the number of unseen email messages (which includes the number of email messages that have been received at the user's inbox and have not been viewed or marked as read using another email client since the time listed on the timestamp). The computer system also sends a push notification with the number of unseen email messages to each of the user's subscribed mobile devices. 各实施例涉及向移动设备用户提供对未看见电子邮件消息的指示，以建立未看见电子邮件消息计数并跨多个移动设备维持致的未看见电子邮件消息计数。在个场景中，计算机系统接收为用户订阅电子邮件推送通知的订阅数据。订阅数据包括