MX Guardian is a cloud-based email spam and malware filtering service that works silently in the background to protect your users from phishing attacks, viruses, spam, denial-of-service (DoS) attacks and other email threats. It frees up your mail server so it only has to deal with legitimate messages and provides a backup MX service to prevent messages from bouncing in case your server is temporarily down or unreachable.

MX Guardian is designed for businesses, ISPs, web-hosting companies, or anyone who has a domain that receives email. We're also compatible with popular cloud platforms such as Microsoft Office 365 and Google G Suite.

Don't let our prices fool you. We have a long list of available features - without any hidden fees.

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Nothing To Install

All email filtering takes place on our servers, in the cloud. We are constantly updating our detection engines so you don't have to.

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Real-Time Reports

Analyze trends and see the effectiveness of our filtering technology at any time. Or if you choose, have a daily report sent straight to your inbox.

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LDAP Synchronization

Synchronize your user list with any LDAP-compatible server such as Microsoft Active Directory so you don't need to manually add & remove users.

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Protect Your Network

Spam, viruses, and phishing scams are all safely quarantined on our servers so they don't waste your valuable bandwidth.

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User Quarantines

Users can safely review their quarantined messages from our web-based control panel and release messages if necessary.

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Email Server Monitoring

Receive instant alerts via SMS or email when your mail server is not responding.

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Message Queuing

In the event your server is down, we prevent messages from bouncing by keeping them in our queue until your server is back online.

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Allow/Block Lists

Users can allow or block sender addresses and domains by adding them to an Allow List or a Block List. In addition, administrators can define domain-wide lists.

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Pass-Through Authentication

Users can login to our control panel using their email password. We support POP3, IMAP, and LDAP pass-through authentication.

By making a simple change to your domain's MX record, all your incoming messages are redirected to our dedicated filtering servers. We use advanced spam-detection algorithms and multiple anti-virus engines to identify spam, viruses, phishing attacks, and other threats. Once the undesirable messages have been safely quarantined or deleted, the remaining legitimate messages are sent to your existing mail server for delivery as usual. This reduces the load on your production mail server, saves Internet bandwidth, and increases your network security by stopping threats before they enter your network. Since all the filtering is done on our servers, there is nothing for you to install or maintain. In the event your server is down or unreachable, we prevent messages from bouncing by keeping them in our queue until your server is back online.

Pricing is based on the total number of users across all your domains. What is a user?

Price Table
Users Price per User per Month

All prices are in US Dollars

Everything is included. No hidden fees.

  • Unlimited messages
  • Unlimited domains
  • Admin control panel
  • User-level control panel
  • No contract. Cancel anytime
  • No overages


Take a test drive and see for yourself how well it works! Set up is simple and takes only a few minutes.

  • Get all features FREE for 30 days
  • Get started in 2 minutes!
  • No contracts. Cancel anytime
  • No payment info required