Email Gateway

Reliable Cloud Based Spam Filtering For Your Entire Company

Spam filtering your mail and have it delivered instantly to your mail server. Custom SMTP ports are supported.

As a leader in email delivery, we provide spam filtering to customers all over the globe. We have data centers on multiple continents and utilize the best in class data centers for all of our services.  With our cloud based Email Gateway, 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. Our high performance network is specifically designed to minimize delays and deliver only clean mail to your users inbox, a typical messages 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. The DuoCircle Email Gateway incorporates the features that you’d expect in an Enterprise Grade Spam Filtering solution at a fraction of the cost.

Works with On-Premises and Hosted Email Systems

Whether you manage your own mail server such as Microsoft Exchange or use a hosted service like Office 365, the backup MX service takes only minutes to set up. DuoCircle provides you much greater control and protection over your email communication with a flexible interface for email management.


Email Gateway

  • Enterprise Grade Spam filtering – All Backup MX services include commercial anti-spam filtering, with customizable rules.
  • Smart Quarantine® – Cut junk mail even more with advanced quarantine. Unlimited users. Instant protection. No additional configuration
  • Multiple Delivery Ports available –Relay mail to any of the following ports: 24, 25, 26, 587, 2525, 10025, 5252
  • TLS Encryption Security – All mail can be delivered with TLS enabled which creates an encrypted tunnel for secure messages delivery.
  • Uncapped Email Storage – During your outage our servers will accept all the mail for your entire domain.Per message size limit 50MB.
  • Commercial Antivirus – An advanced multi tiered anti-virus engine that offers complete protection for your inbox. Rules updated multiple times per day.
  • Unlimited Users – If you have one or one thousand users our system our backup MX server will automatically spool your mail.
  • Backup Queue – We offer backup queuing for unexpected downtime on a main MX server for 10 days, storing and forwarding when you’re ready.
  • 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.
  • 24/7 email, chat and phone support
Email Gateway Standard