Anti-spam protection

microsoft exchange email flow

Stop All Email Threats

Spammers (malicious senders) use a variety of techniques to send unwanted junk mail to your Exchange server. The spam protection built into Exchange can't eliminate all spam (sorry Microsoft, it just doesn't work).

Imagine stopping spam, phishing attacks, malware and viruses with no hardware, no software, no contracts and no maintance.

MX Guarddog's complete email security service scans your incoming mail for all types of threats, offending mail is held in secure quarantine in our network. Your users receive quarantine reports containing recently stopped messages and can review/release/whitelist with a single click.

Clean mail is automatically forwarded to your Exchange server for delivery, regardless if on-premises at your office or hosted in the cloud.

Setup is quick with no required changes to your Exchange infastructure or alterations to your email clients. Yea, I know. Sounds incredible right?!?

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Secure Email Communication

email encryption

Strong encryption ensures that your sensitive email is protected as it travels over the Internet. MX Guarddog uses the highest levels of Transport Layer Security (TLS) based encryption, including Perfect Forward Security (PFS) to ensure your secure email remains secure.


Microsoft Exchange users can take advantage of our LDAP Sync service, which is 100% Exchange compatible. When you add or remove users from your Exchange server, our servers will automatically pick up the changes. Keeping your active user list in sync with our edge servers, messages to invalid recipients are rejected preventing any dictionary or bruit force attacks from ever reaching your server.

  • Never Miss Quarantine Reports

    We send quarantine reports to every user at your domain with a summary of spam stopped from reaching their mailbox. Users can adjust their own quarantine report preferences.

  • Free Trial First Month Free

    No credit card required, no contract and no sales calls. Try our service for free, then keep it free forever.

  • Account Sync AD, LDAP & cPanel

    Automatically sync your active email addresses from Windows AD, LDAP or cPanel systems and prevent dictionary attacks from reaching your network.

  • Outage Protect 168 Hour Spooling

    If your server is unavailable, we will spool your mail. Once you're back online your mail gets delivered automatically.

Why choose Us

MX Guarddog has been in operation since 2006, securing your email is our primary objective. We employ the latest technologies in spam protection, anti-virus, anti-malware, anti-phishing and encryption to ensure your email is safe and spam free.

  • Instant Activation
  • Unlimited Messages
  • Geographic Redundancy
  • Catch-all Support
  • 99.95% SLA
  • Quarantine Reports
  • No Contract Lock-in
  • Message Encryption
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What Our Customers Say

Joe Apple Testimonial Joe Apple - USA Travis Charest Gallery I used to spend twenty minutes a day looking through spam.
After switching to MX Guarddog my mailbox is clean, your system really works well, I could not be happier.
Thanks guys!

Justin Testimonial Justin B - USAOwner, JBH Limo After struggling with trying to find an external mail filtering service which is affordable for a small business, your service has been the only one that has delivered!

Allan Testimonial Allan N - UKIT Consultant We deployed MX Guarddog for five clients plus our own Exchange server. Out of the box with it works brilliantly, the quarantine emails are great for our users. This system out performs many commercial spam filters we have sold.

Dave Coopey Dave Coopey - UK Owner, Photokids I am a freelance IT Technical Project Manager ... Your service has changed the way we have to deal with emails ... Many many thanks for your service, I would not want to be without it ...

Jakz Testimonial Jay MacPherson - CanadaJakz Kick Spamassassin's Ass! Thank you for offering such a needed service, I love it!

Cassio Testimonial Cassio F - BrazilIT Consultant The reliability of MX guard dog is amazing, I never have to worry about spam or viruses slipping through into my networks. Hands-down the best spam filtering service out there.