Servers in Multiple Geographic Zones for Email Filtering

Objective

To guide users on how DuoCircle's email filtering service uses geographically distributed servers to enhance redundancy and provide regional filtering options.

Introduction

DuoCircle is committed to ensuring both data privacy and network redundancy. One way to achieve this is by distributing email filtering services across multiple geographic zones. This document explains how servers in different data centers around the world enhance network resilience and provide options for filtering emails within specific regions like the European Union (EU) or the United States (USA).

Prerequisites

  • Access to your domain’s MX (Mail Exchange) records
  • Understanding of your email filtering needs (whether to keep email filtering within the EU, USA, or both)
  • Access to firewall settings (if applicable)

Step-by-Step Instructions

  1. Understand the Benefits of Geographic Redundancy
    DuoCircle has deployed email filtering servers across multiple regions, ensuring redundancy and uninterrupted email service. This setup allows the network to self-heal during local outages, maintaining email continuity. Users in the European Union have the option to filter email strictly within EU boundaries.
  2. Default Configuration
    For 99% of customers, using the following MX records provides optimal load balancing across all our servers:
  3. By using this setup, your email is balanced across multiple geographic zones, increasing redundancy.
  4. Exclusive Filtering in the European Union
    If you prefer that your email is filtered exclusively in the EU, modify your MX record to:
    • mx1.eu.mailhop.org
  5. Exclusive Filtering in the USA
    If you prefer that your email does not leave the USA, update your MX record to:
    • mx1.us.mailhop.org
  6. Updating Firewall Settings
    If you have a firewall in front of your mail server and are using DuoCircle’s Hosted SMTP service, ensure that all DuoCircle IPs are whitelisted, not just the EU-based IPs. This will ensure email continuity in case of a regional failure that requires rerouting through other servers.
    Learn more about DuoCircle's IP addresses for firewalls

Conclusion

By distributing email filtering services across multiple geographic zones, DuoCircle enhances redundancy and ensures email continuity. You can choose to keep email filtering within specific regions, like the EU or the USA, based on your preferences.


For more details about DuoCircle’s data centers, visit DuoCircle Data Centers.