The Coremail mail system is a large-scale enterprise mail system independently researched and developed by Coremail Eristic. After 20 years of in-depth research and development, the system technology is mature, and the performance is stable and efficient, which can give full play of the performance of the mail server. Therefore, it is the preferred solution for many well-known enterprises, government and universities to set up the mail server systems and enterprise mailboxes.

Overseas email: Undifferentiated email service facing the world
Email service that is based in China and towards the world

CoremailThe Coremail overseas email cloud service platform ensures the smooth mail sending and receiving channels by deploying multiple "overseas proxy servers" at different regions (multiple network operators' backbone network data centers) overseas, and adopts heartbeat security mechanism and unique cache mechanism to form a stable and efficient delivery system; Adopt unique Coremail private communication protocols and encryption measures to continuously optimize and improve the international transmission path so as to avoid international exit errors and domestic and international network congestion, which has fundamentally solved the obstructed problem of overseas email. Ensure that enterprises send overseas emails without obstruction.

Multi-node link mechanism

In order to ensure the stability of overseas email service, Coremail has deployed multiple overseas email servers in different regions such as Hong Kong and the United States. Each server uses an advanced multi-node link mechanism to optimize the international links and avoid congestion.

Coremail private communication protocol

Coremail overseas email cloud service adopts a self-developed encoding/decoding communication protocol to encrypt and compress the email content, which can smoothly avoid the above problems. It not only ensures the security of transmission, but also can greatly compress the content of email, to improve the speed of overseas email forwarding and the success rate.

Intelligent DNS service

When a foreign user sends an email to the domestic area, the intelligent DNS will automatically initiate a query based on the user's current network environment to which the destination email server address belongs. Thereafter, the delivery address will be directed to the overseas email server, and then the email will be safely and quickly delivered to the domestic target server through the overseas mail server.

Coremail overseas mail demand background

National firewall filtering

The national firewall may filter out overseas IP connections involving sensitive content, resulting in poor transmission and reception.

Inter-country gateway compatibility problem

The network congestion between domestic and foreign countries and the excessive number of hops between routers result in high rate of failed connection.

Antispam issue

China has become the second largest spam mail sender in the world since 2008, causing that many IP addresses of the domestic servers are blacklisted by overseas anti-spam organizations.

Coremail overseas email functional advantage
  • Coremail private communication protocol

    Customers use the SMTP protocol for overseas email, and email sending may fail due to the firewall intercept. That to use Coremail's self-developed communication protocol to encrypt and compress email content will not only guarantees the transmission security, but also greatly promotes the speed and success rate of overseas email forwarding.

  • Perfect overseas proxy forwarding system

    In order to increase the success rate of overseas email forwarding, Coremail has deployed multiple overseas forwarding proxy servers in different regions such as Hong Kong, to form a perfect overseas email forwarding system. The system will select the appropriate proxy server to provide the mail forwarding service for customers through the intelligent judgment forwarding mechanism. The entire process requires no manual intervention and is completed by the system intelligently in an instant.

  • Safe and efficient operating mechanism

    Coremail overseas email cloud service platform provides stable and efficient overseas email proxy forwarding for customers. Through flexible overseas email server deployment, advanced heartbeat function and unique cache mechanism, it will keep the system run safely and efficiently.