Getting Started

Default solution folder, feel free to edit or delete it.

How can I get technical support?
Providing an Enterprise Support Experience is a critical differentiator of the DuoCircle Service.  We are one of the few providers who publish our pho...
Thu, 25 Feb, 2016 at 10:51 PM
Who is DuoCircle?
DuoCircle is an entity that was established for the migration of Dyn’s legacy email receiving products customers to a more powerful and feature rich email h...
Mon, 17 Dec, 2018 at 6:41 PM
Why am I not receiving email?
Backup and Gateway If you are not receiving Email, you should first make sure your server is reachable on port 25; you can telnet to it using: telnet doma...
Tue, 18 Dec, 2018 at 6:40 PM
How do I login to manage my account?
How to mange your account settings, including payments: You can manage the settings on your account by logging into our Admin portal at https://admin....
Thu, 25 Feb, 2016 at 10:47 PM
Where can I see the current system status?
Our status page can be found at  From the status page you can subscribe to notifications for real time updates to the c...
Sat, 31 Jan, 2015 at 8:36 PM
How will I manage my account?
You will have full access to a web based management portal that will allow you to update your settings, configurations and parameters. The admin portal...
Fri, 2 Sep, 2016 at 9:59 PM
Download our W-9
You can download a copy of the DuoCircle W-9 form here:
Wed, 7 Jul, 2021 at 8:39 PM
IP Addresses for Firewalls
Please add ALL of the delivery IP addresses to your firewall or filters.  This list was updated and shortened on Jan 1, 2020 with the netblock 204.27.2...
Sat, 9 Jan, 2021 at 2:36 AM
How do I view and update my MX Records
If you are using any of these services you will need to update your MX records to point to the inbound mail servers: Email Gateway Email Backup MX ...
Tue, 18 Dec, 2018 at 6:56 PM
Password Reset
To reset your password for your account please click on - NOTE: You can now reset your admin password independently...
Tue, 18 Dec, 2018 at 8:18 PM

DuoCircle LLC provides email security services. Our solutions include phishing protection, smtp as a service, office 365 tenant to tenant migration, mx backup, email archiving and spam filtering and other solutions.