Geographically Diverse Spam Filtering Zones
Quick Answer
DuoCircle's spam filtering runs across multiple data centers including an Amazon Frankfurt presence in Germany, giving customers a self-healing network and an EU-only filtering option for data residency. As of March 1, 2016, inbound traffic is load-balanced across all zones for 99% of customers using mx1.mailhop.org, mx2.mailhop.org, or a custom MX from the portal. To filter exclusively in the EU, switch your MX to mx1.eu.mailhop.org. To stay in the US only, use mx1.us.mailhop.org. If your firewall sits in front of your mail server, allowlist all DuoCircle IP ranges (not just the regional ones) so traffic still flows during catastrophic failover.
Servers in multiple Geographic Zones
We care about your data privacy and security as well as creating the most redundant network possible for your Spam Filtering needs.
We feel that one way to ensure that our network is as robust as possible is to have servers in multiple data centers around the globe. So that if there are any regional or local connectivity problems that the network will be self healing and your mail will continue to flow. To this end we have build out a point of presence in the Amazon Frankfurt Germany data center because it provides not only geographic diversity but also allows our customers in the EU a filtering option that keeps their mail within the boundaries of the European Union.
However some customer may prefer to have their email filtered exclusively in the European Union rather than a combination of the USA and Europe.
For 99% of our customers utilizing mx1.mailhop.org, mx2.mailhop.org or your custom MX record from the portal is your best option. Your messages your messages will be balanced over ALL of our servers, and you’ll benefit from the geographic diversity and even grater redundancy that having filtering servers in multiple region affords. However if you would prefer your email ONLY be filtered in one geographic zone we can accommodate your needs.
Updating your MX records to use a single filtering zone rather than being globally load balanced
To have your email exclusively filtered in the EU please change your MX record to:
- mx1.eu.mailhop.org
Conversely if you’d prefer that you mail never goes to the EU and stays within the United States of America you can use this MX record:
- mx1.us.mailhop.org
Updating your firewall
If you have a firewall in front of your mail server please ensure that you are allowing / whitelisting all of our IP’s (not just the EU) – This is important if there is a catastrophic failure and we need to route your email via an alternate location we will still be able to communicate with your mail server.
https://support.duocircle.com/solution/articles/5000524218-ip-addresses-for-firewalls
Switch Over Date
As of March 1 2016 inbound traffic will be load balanced over all zones.
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General Manager
General Manager at DuoCircle. Product strategy and commercial lead across the email security portfolio.
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