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DuoCircle LLC

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564 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

473 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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1
JG
James G.
03/31/2026
Validated Reviewer
Review source: Organic

Effortless Email Management and Security Boost with DMARC Report

I appreciate how DMARC Report helps me manage all my clients' email security and DNS records efficiently. The dns wizard makes it easy to create the appropriate DNS records, which is a big relief. I particularly like the daily reporting feature that allows me to easily see the status of my clients' email security. It's incredibly convenient to have everything in one place, and the initial setup was very easy.
Péter Z.
PZ
Péter Z.
03/31/2026
Validated Reviewer
Review source: Organic

A Must-Have Tool for Reliable DMARC Visibility and Agency Growth

What I appreciate most is the perfect balance between high-level clarity and technical depth. It takes complex DMARC XML data and turns it into actionable, easy-to-read reports that anyone on the team can understand. The Hosted DMARC and MTA-STS features are absolute game-changers—they significantly simplify DNS management and reduce the risk of configuration errors. For someone managing multiple domains or clients, the multi-tenant dashboard is incredibly efficient. It provides instant visibility into pass rates, alignment, and spoofing attempts, giving us total confidence in our email deliverability. Plus, the customer support is top-notch—fast, knowledgeable, and always ready to help.
Verified User in Utilities
AU
Verified User in Utilities
03/25/2026
Validated Reviewer
Review source: Organic

A Must-Have for Email Security and Compliance

DMARC Report takes the complexity out of email authentication. Its intuitive dashboard and clear reporting make SPF, DKIM, and DMARC configuration straightforward—even for non-technical users. Weekly deliverability stats and actionable insights ensure that emails are secure and reach their destination without hiccups. The alert system and exportable reports are excellent for MSPs and businesses managing multiple domains.

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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