SPAM FILTERING

Get Spam, Malware and Phishing protection for one low price with Advanced Threat Protection.

Lift Off To A True Enterprise Grade, Spam Filtering Experience

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.

As a leader in email delivery, we provide spam filtering to customers all over the globe. We have data centers in multiple continents and utilize the best in class data centers for all of our services.

With our cloud mail server – hosting gateway service, you can run your own mail server in your office or use a Cloud Based provider – while we filter and sanitize your mail with our commercial grade spam filtering engine with phishing protection.

Enterprise Grade Spam filtering


Includes commercial anti-spam and multi-tiered anti-virus filtering, with customizable rules updated hourly

MX Backup


Includes email storage for 30 days. And, if your server fails our servers will accept all the mail for your entire domain automagically.

Smart Quarantine®


Cut junk mail even more with advanced quarantine. Unlimited users. Instant protection. No additional configuration

Seamless Integration with On-Premises

or Hosted Email


DuoCircle works seamlessly with your own mail server such as Microsoft Exchange or any hosted service like Office 365


Spam Free Emails. Secure MX Backups. Lightning Fast Delivery.

Our high performance network is specifically designed to minimize delays and deliver only clean mail to your users inbox.


A typical message spends less than 4 seconds in our network before being successfully delivered to your mail server.


If for any reason, your mail server is offline when we attempt delivery – our Email Gateway service will behave like a Backup MX and wait for your mail server to come back online.

Multiple Delivery Ports


With DuoCircle you get to send your Relay Mail to any of the following ports: 24, 25, 26, 587, 2525, 10025, 5252.

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TLS Encryption Security


All mail can be delivered with TLS enabled which creates an encrypted tunnel for secure messages delivery.

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Activity Logs


The administrator will have real time access to the mail queue and logs to verify that mail is being spooled during an outage.

All Spam Filtering Plans Get


Spam Filtering Gateway is a component in our Advanced Threat Defense Suite

  • Unlimited Users
  • Unlimited Inbound Message Volume
  • Malicious Attachment Blocking
  • Whitelisting / Blacklisting
  • Custom Filtering Rules
  • 24/7 email, chat and phone support.
  • Activity logs – The administrator will have real-time access to the mail queue and logs to verify that mail being forwarded to the destination server.
  • Smart Quarantine – Cut junk mail even more with advanced quarantine. Read more
  • No per user fees
  • No message overage costs
  • No per message fees
  • Cloud-Based Spam Filtering
  • Catch Malware Before It Hits Your Server
  • Phishing Protection
  • Malware Protection
  • Ransomware Protection
  • Your inbox 99% Spam Free
  • Money Back Guarantee
  • 30 Day Backup queue – 30 Days of MX backup
    service included.

Spam Filtering without  Phishing Protection

Spam Filtering with Phishing Protection

Join the thousands of organizations that use DuoCircle


Find out how affordable it is for your organization today and be pleasantly surprised.

Interested in our Partner Program for MSPs and VARs? Visit Our MSP Partner Program.

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