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DuoCircle LLC

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562 reviews
  • 9 profiles
  • 9 categories
Average star rating
4.8
#1 in 1 categories
Grid® leader
Serving customers since
2014
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DMARC Report

471 reviews

Built specifically for MSPs and large domain portfolio reporting, DMARC Report is a powerful reporting tool for measuring the quality of outgoing emails and watching out for sneaky cyberattacks. You can safeguard your outgoing emails from threats like domain forgery, email spoofing, and other phishing attacks. DMARC Report gives businesses an inside look at how their customers receive or react to their messages. It also allows them to identify whether malicious activity like domain forging may be taking place on other networks outside of theirs; it's just good cybersecurity practice!

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Phish Protection by DuoCircle

46 reviews

A cloud-based, integrated, email protection suite that stops phishing, malware, spam and spoofing without installing any expensive anti-phishing tools.

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AutoSPF

21 reviews

Overcome the 10 Lookup Limit on SPF records with AutoSPF. SPF flattening and management powered by Cloudflare.

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OutboundSMTP

13 reviews

A High Performance Outbound SMTP Service

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Mailflow Monitoring

4 reviews

Mailflow Monitoring alerts you, in real-time, to down email servers and helps diagnose excessive delivery delays. Things that can negatively impact your business if not corrected quickly. And it's FREE.

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Tenant Migration

3 reviews

Tenant Migration is an enterprise-grade email queuing service designed to ensure zero email loss during Office 365 or Google Workspace tenant migrations. By capturing and securely storing incoming emails for up to 45 days, it guarantees uninterrupted communication throughout the migration process. Key Features and Functionality: - Unlimited Mailboxes and Storage: Accommodates any number of mailboxes without storage limitations, ensuring scalability for organizations of all sizes. - High-Capacity Servers: Utilizes robust servers capable of handling large volumes of emails efficiently. - Automatic Failover: Automatically queues emails whenever the primary mail server is unavailable, preventing any loss of communication. - Message Replay: Offers an exclusive feature that allows for the redelivery of messages, providing a safety net in case of initial delivery failures. - Real-Time Control Panel: Provides an intuitive interface to monitor queued messages and manage their delivery with ease. - 24/7 Technical Support: Ensures round-the-clock assistance through live chat, phone, and email to address any issues promptly. Primary Value and User Solutions: Tenant Migration addresses the critical challenge of email loss during tenant migrations by offering a reliable and secure email queuing solution. It mitigates business risks associated with email downtime, ensuring that no messages are lost even when the primary mail server is down. This service is particularly valuable for organizations undergoing mergers, acquisitions, or any scenario requiring tenant migration, providing peace of mind with its SOC 2 certified platform and straightforward setup process.

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DuoCircle Spam Filtering

2 reviews

The DuoCircle enterprise email security with its SMTP gateway incorporates the features that you’d expect in an Enterprise Grade Spam Filtering solution at a fraction of the cost.

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Mail Hosting Services

1 review

Secure, easy to use email IMAP/Webmail accounts for business.

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Spamsentinel

1 review

SpamSentinel is an advanced email security solution designed to protect your HCL Domino environment from spam, phishing, and other email threats. Reliable & Secure – It provides real-time spam filtering, malware scanning, and anti-phishing protection to keep your organization’s email safe and efficient. Seamlessly integrating with HCL Domino, SpamSentinel is easy to deploy and highly effective at reducing unwanted email clutter.

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DuoCircle LLC Reviews

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Star Rating
503
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1
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1
Verified User in Graphic Design
AG
Verified User in Graphic Design
06/12/2026
Validated Reviewer
Verified Current User
Review source: Organic

Offers a great value for my small business.

As a small business owner, I was initially intimidated by the idea of setting up DMARC, SPF, and DKIM. It sounded like a lot of DNS complexity I didn't have time for. DMARC Report simplified the process and got me up and running in a very reasonable time. I get readable reports (I use "Aanalyze with AI" option) instead of raw XML I never understood on my own. I'm thankful for the guidance and protection it provides. The piece of mind is definitely worth the price for me.
Gary M.
GM
Gary M.
06/10/2026
Validated Reviewer
Review source: Organic

Technical Clarity Made Easy: The Perfect Tool for Multi-Domain DMARC Deployment

Excellent Tool for Simplifying Email Authentication DMARCREPORT.com takes the guesswork out of email security. The step-by-step wizard walks you through setting up your email parameters effortlessly, making a complex technical process simple to execute. One of the best features is the instant, clear feedback showing whether your DNS records are configured properly. Once set up, the dashboard provides a fantastic, centralized view to monitor all your domains at a glance. It is an invaluable tool for maintaining domain health and security. Highly recommended!
Alpesh P.
AP
Alpesh P.
04/02/2026
Validated Reviewer
Verified Current User
Review source: Organic

Email Authentication made easy - config & reporting!

Easy & intuitive interface - clear & easy to follow instructions (<1min per domain) Quick customer service and resolution. Happy customer/partner since Feb'2022

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HQ Location:
San Diego, CA

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@duocirclellc

What is DuoCircle LLC?

Reliable and Secure email hosting services for SMB and Enterprise. Safely processing over 100 million emails per month for our customers. Enhanced gateway security and filtering, inbound email security, email service backup and outbound SMTP using a new high quality infrastructure for top quality results that our customers deserve. Products include, Secure email gateway, email backup MX, email forwarding, outbound SMTP and more...

Details

Year Founded
2014