---
title: "New MX Records for DNS Redundancy | DuoCircle"
description: "On July 1 we experienced DNS failure of our top level mailhop.org domain which impacted customers to a varying degree before ICANN resolved the problem."
image: "https://www.duocircle.com/images/og-default.png"
canonical: "https://www.duocircle.com/blog/announcements/new-mx-records-dns-redundancy/"
---

Quick Answer

After a July 1 DNS failure of the mailhop.org TLD that ICANN eventually resolved, DuoCircle added redundant DNS to remove single points of failure. The mailhop.org zone is hosted by DYN, with Amazon Route 53 and Cloudflare added as additional providers across separate registrars and TLDs. Customers should configure backup MX records as follows. Email Gateway / Email Forwarding: MX 10 your custom record or mx1.mailhop.org, MX 20 mx1.mailhop.us, MX 30 mx1.mailhop.co, MX 40 mx1.mailhop.co.uk. Backup MX: MX 5 your existing mail server, MX 10 mx2.mailhop.org or your custom record, MX 20 mx2.mailhop.us, MX 30 mx2.mailhop.co, MX 40 mx2.mailhop.co.uk.

Share 

[ ](https://www.linkedin.com/sharing/share-offsite/?url=undefined%2Fblog%2Fannouncements%2Fnew-mx-records-dns-redundancy%2F "Share on LinkedIn") [ ](https://twitter.com/intent/tweet?text=New%20MX%20Records%20for%20DNS%20Redundancy&url=undefined%2Fblog%2Fannouncements%2Fnew-mx-records-dns-redundancy%2F "Share on X/Twitter") [ ](https://www.facebook.com/sharer/sharer.php?u=undefined%2Fblog%2Fannouncements%2Fnew-mx-records-dns-redundancy%2F "Share on Facebook") [ ](https://reddit.com/submit?url=undefined%2Fblog%2Fannouncements%2Fnew-mx-records-dns-redundancy%2F&title=New%20MX%20Records%20for%20DNS%20Redundancy "Share on Reddit") [ ](mailto:?subject=New%20MX%20Records%20for%20DNS%20Redundancy&body=Check out this article: undefined%2Fblog%2Fannouncements%2Fnew-mx-records-dns-redundancy%2F "Share via Email") 

![DNS Redundancy](https://media.mailhop.org/duocircle/images/2016/07/spf-record-check-4395.jpg) 

On July 1 we experienced DNS failure of our top level mailhop.org domain which impacted customers to a varying degree before ICANN resolved the problem. Part of our mission statement is to minimize all single points of failure for your email service. As a response to this problem we have created three new DNS zones that you should immediately add to your DNS record.

[![Cloudflare](https://media.mailhop.org/duocircle/images/2016/07/sender-policy-framework-6480.jpg)](https://media.mailhop.org/duocircle/images/2016/07/sender-policy-framework-6480.jpg)

The mailhop.org DNS is handled by DYN, we have now added [Amazon’s Route 53](https://aws.amazon.com/route53/) and [Cloudflare](https://www.cloudflare.com/dns/) as redundant DNS providers and have created multiple zones for redundancy. Not only are these domains registered with difference registrars, they are also utilizing independent TLD’s (Top Level Domains) and different DNS providers.

To you should configure your DNS so that your custom MX record or mx1.mailhop.org is set to priority 10 and the additional records should be configured like this:

**Email Gateway / Email Forwarding** 

MX 10 Your custom MX Record (from [customer portal](https://portal.duocircle.com)) or mx1.mailhop.**org**  
MX 20 mx1.mailhop.**us**  
MX 30 mx1.mailhop.**co**  
MX 40 mx1.mailhop.**co.uk**

**Backup MX**

[![customer portal](https://media.mailhop.org/duocircle/images/2016/07/spf-record-tester-5193.jpg)](https://media.mailhop.org/duocircle/images/2016/07/spf-record-tester-5193.jpg)

MX 5 Your **current mx record**, this is your server directly or your own filtering destination  
MX 10 Your custom MX Record (from [customer portal](https://portal.duocircle.com)) or **mx2**.mailhop.**org**  
MX 20 mx2.mailhop.**us**  
MX 30 mx2.mailhop.**co**  
MX 40 mx2.mailhop.**co.uk**

We are urging customers to make this change as soon as possible to minimize any future DNS related issue.

![Brad Slavin](https://media.mailhop.org/dmarcreport/images/team/brad-slavin.jpg) 

Brad Slavin 

General Manager

General Manager at DuoCircle. Product strategy and commercial lead across the email security portfolio.

## Secure your email infrastructure

Protect, authenticate, and deliver. Contact our team to find the right solution.

[Contact Sales](/contact/) [Explore Products](/products/) 

## Related Articles

[  News 3m  Alert: Fix SPF & DKIM Settings For Your Email Forwarding Set Up Through Microsoft o365 SMTP Server Or Your Emails May End Up In Spam  Jul 20, 2021 ](/blog/announcements/alert-fix-spf-dkim-settings-for-your-email-forwarding-set-up-through-microsoft-o365-smtp-server-or-your-emails-may-end-up-in-spam/)[  News 1m  April Spam Filtering Uptime Report  May 4, 2016 ](/blog/announcements/april-spam-filtering-uptime-report/)[  News 2m  Changes to Spam Filtering Technology  Feb 8, 2023 ](/blog/announcements/changes-to-spam-filtering-technology/)[  News 4m  Cyber Security News Update, Week 1 of 2020  Jan 3, 2020 ](/blog/announcements/cyber-security-news-update-week-1-of-2020/)

```json
{"@context":"https://schema.org","@type":"Organization","name":"DuoCircle LLC","url":"https://www.duocircle.com","logo":{"@type":"ImageObject","url":"https://www.duocircle.com/images/duocircle-logo.png"},"description":"DuoCircle is a portfolio of specialized email products covering protection, authentication, delivery, and routing. We deliver about 90% of category-leader capability at roughly half the price, backed by experts who own the outcome. Trusted by 50,000+ organizations since 2014.","subOrganization":[{"@type":"Organization","@id":"https://www.wikidata.org/wiki/Q138898167","name":"DMARC Report","url":"https://dmarcreport.com"},{"@type":"Organization","@id":"https://www.wikidata.org/wiki/Q138897474","name":"AutoSPF","url":"https://autospf.com"},{"@type":"Organization","@id":"https://www.wikidata.org/wiki/Q138897912","name":"Phish Protection","url":"https://www.phishprotection.com"}],"sameAs":["https://www.linkedin.com/company/duocircle","https://x.com/duocirclellc","https://www.facebook.com/duocirclellc","https://www.g2.com/products/phish-protection-by-duocircle/reviews","https://github.com/duocircle","https://www.crunchbase.com/organization/duocircle-llc"],"contactPoint":{"@type":"ContactPoint","contactType":"customer support","url":"https://support.duocircle.com"},"knowsAbout":["Email Security","Email Authentication","SPF","DKIM","DMARC","Phishing Protection","Spam Filtering","SMTP Relay","Email Deliverability","Email Forwarding"]}
```

```json
{"@context":"https://schema.org","@type":"WebSite","name":"DuoCircle LLC","url":"https://www.duocircle.com","description":"DuoCircle is a portfolio of specialized email products covering protection, authentication, delivery, and routing. We deliver about 90% of category-leader capability at roughly half the price, backed by experts who own the outcome. Trusted by 50,000+ organizations since 2014.","publisher":{"@type":"Organization","name":"DuoCircle LLC","url":"https://www.duocircle.com","logo":{"@type":"ImageObject","url":"https://www.duocircle.com/images/duocircle-logo.png"},"description":"DuoCircle is a portfolio of specialized email products covering protection, authentication, delivery, and routing. We deliver about 90% of category-leader capability at roughly half the price, backed by experts who own the outcome. Trusted by 50,000+ organizations since 2014.","subOrganization":[{"@type":"Organization","@id":"https://www.wikidata.org/wiki/Q138898167","name":"DMARC Report","url":"https://dmarcreport.com"},{"@type":"Organization","@id":"https://www.wikidata.org/wiki/Q138897474","name":"AutoSPF","url":"https://autospf.com"},{"@type":"Organization","@id":"https://www.wikidata.org/wiki/Q138897912","name":"Phish Protection","url":"https://www.phishprotection.com"}]}}
```

```json
[{"@context":"https://schema.org","@type":"BlogPosting","headline":"New MX Records for DNS Redundancy","description":"On July 1 we experienced DNS failure of our top level mailhop.org domain which impacted customers to a varying degree before ICANN resolved the problem.","url":"https://www.duocircle.com/blog/announcements/new-mx-records-dns-redundancy/","datePublished":"2016-07-26T05:07:49.000Z","dateModified":"2025-05-13T12:13:37.000Z","dateCreated":"2016-07-26T05:07:49.000Z","author":{"@type":"Person","@id":"https://www.duocircle.com/authors/brad-slavin/#person","name":"Brad Slavin","url":"https://www.duocircle.com/authors/brad-slavin/","jobTitle":"General Manager","description":"Brad Slavin runs DuoCircle, the company behind DMARC Report, AutoSPF, Phish Protection, and Mailhop. His focus is product strategy, customer relationships, and the commercial and compliance side of email authentication (DPAs, SLAs, enterprise procurement).","image":"https://media.mailhop.org/dmarcreport/images/team/brad-slavin.jpg","knowsAbout":["Email Security Strategy","SaaS Product Management","Enterprise Compliance","Customer Success","Email Deliverability Business"],"worksFor":{"@type":"Organization","name":"DuoCircle LLC","url":"https://www.duocircle.com"},"sameAs":["https://www.linkedin.com/in/bradslavin"]},"publisher":{"@type":"Organization","name":"DuoCircle LLC","url":"https://www.duocircle.com","logo":{"@type":"ImageObject","url":"https://www.duocircle.com/images/duocircle-logo.png"},"description":"DuoCircle is a portfolio of specialized email products covering protection, authentication, delivery, and routing. We deliver about 90% of category-leader capability at roughly half the price, backed by experts who own the outcome. Trusted by 50,000+ organizations since 2014.","subOrganization":[{"@type":"Organization","@id":"https://www.wikidata.org/wiki/Q138898167","name":"DMARC Report","url":"https://dmarcreport.com"},{"@type":"Organization","@id":"https://www.wikidata.org/wiki/Q138897474","name":"AutoSPF","url":"https://autospf.com"},{"@type":"Organization","@id":"https://www.wikidata.org/wiki/Q138897912","name":"Phish Protection","url":"https://www.phishprotection.com"}]},"mainEntityOfPage":{"@type":"WebPage","@id":"https://www.duocircle.com/blog/announcements/new-mx-records-dns-redundancy/"},"articleSection":"announcements","keywords":"","wordCount":224,"image":{"@type":"ImageObject","url":"https://media.mailhop.org/duocircle/images/2016/07/spf-record-check-4395.jpg","caption":"DNS Redundancy","width":900,"height":600},"speakable":{"@type":"SpeakableSpecification","cssSelector":[".answer-block","h1"]}},{"@context":"https://schema.org","@type":"BreadcrumbList","itemListElement":[{"@type":"ListItem","position":1,"name":"Blog","item":"https://www.duocircle.com/blog/"},{"@type":"ListItem","position":2,"name":"News"},{"@type":"ListItem","position":3,"name":"New MX Records for DNS Redundancy","item":"https://www.duocircle.com/blog/announcements/new-mx-records-dns-redundancy/"}]}]
```

```json
{"@context":"https://schema.org","@type":"BreadcrumbList","itemListElement":[{"@type":"ListItem","position":1,"name":"Home","item":"https://www.duocircle.com/"},{"@type":"ListItem","position":2,"name":"Blog","item":"https://www.duocircle.com/blog/"},{"@type":"ListItem","position":3,"name":"News","item":"https://www.duocircle.comundefined"},{"@type":"ListItem","position":4,"name":"New MX Records for DNS Redundancy","item":"https://www.duocircle.com/blog/announcements/new-mx-records-dns-redundancy/"}]}
```

```json
{"@context":"https://schema.org","@type":"BlogPosting","headline":"New MX Records for DNS Redundancy","description":"On July 1 we experienced DNS failure of our top level mailhop.org domain which impacted customers to a varying degree before ICANN resolved the problem.","url":"https://www.duocircle.com/blog/announcements/new-mx-records-dns-redundancy/","datePublished":"2016-07-26T05:07:49.000Z","dateModified":"2025-05-13T12:13:37.000Z","dateCreated":"2016-07-26T05:07:49.000Z","author":{"@type":"Person","@id":"https://www.duocircle.com/authors/brad-slavin/#person","name":"Brad Slavin","url":"https://www.duocircle.com/authors/brad-slavin/","jobTitle":"General Manager","description":"Brad Slavin runs DuoCircle, the company behind DMARC Report, AutoSPF, Phish Protection, and Mailhop. His focus is product strategy, customer relationships, and the commercial and compliance side of email authentication (DPAs, SLAs, enterprise procurement).","image":"https://media.mailhop.org/dmarcreport/images/team/brad-slavin.jpg","knowsAbout":["Email Security Strategy","SaaS Product Management","Enterprise Compliance","Customer Success","Email Deliverability Business"],"worksFor":{"@type":"Organization","name":"DuoCircle LLC","url":"https://www.duocircle.com"},"sameAs":["https://www.linkedin.com/in/bradslavin"]},"publisher":{"@type":"Organization","name":"DuoCircle LLC","url":"https://www.duocircle.com","logo":{"@type":"ImageObject","url":"https://www.duocircle.com/images/duocircle-logo.png"},"description":"DuoCircle is a portfolio of specialized email products covering protection, authentication, delivery, and routing. We deliver about 90% of category-leader capability at roughly half the price, backed by experts who own the outcome. Trusted by 50,000+ organizations since 2014.","subOrganization":[{"@type":"Organization","@id":"https://www.wikidata.org/wiki/Q138898167","name":"DMARC Report","url":"https://dmarcreport.com"},{"@type":"Organization","@id":"https://www.wikidata.org/wiki/Q138897474","name":"AutoSPF","url":"https://autospf.com"},{"@type":"Organization","@id":"https://www.wikidata.org/wiki/Q138897912","name":"Phish Protection","url":"https://www.phishprotection.com"}]},"mainEntityOfPage":{"@type":"WebPage","@id":"https://www.duocircle.com/blog/announcements/new-mx-records-dns-redundancy/"},"articleSection":"announcements","keywords":"","wordCount":224,"image":{"@type":"ImageObject","url":"https://media.mailhop.org/duocircle/images/2016/07/spf-record-check-4395.jpg","caption":"DNS Redundancy","width":900,"height":600},"speakable":{"@type":"SpeakableSpecification","cssSelector":[".answer-block","h1"]}}
```