MX Guarddog

Name: MX Guarddog
Price: 0.25 USD

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Score6.2

Rank#10 of 26

From$0.25/mo

Free planNo

Free trialYes

Runs onWeb

Summary

MX Guarddog is a cloud email gateway for standard SMTP servers used with owned domains. It scans incoming messages for spam, phishing, malware and viruses, quarantines flagged mail, and forwards clean messages to the customer’s server. It does not support consumer Gmail or Hotmail accounts. As a hosted service, it requires no hardware or software installation and no email-client or server configuration changes. When a customer’s server is unavailable, it can hold mail for up to 168 hours and deliver it after service returns. Users receive quarantine reports and can adjust report preferences; quarantine retention is seven days. The service can sync active addresses from Windows AD, LDAP or cPanel, and says it uses Transport Layer Security, including Perfect Forward Security, for email in transit. Pricing is 0.25 USD per email address per month, with no charge for aliases; there is also a free option earned through visible MX Guarddog links on a website. A 30-day trial is listed.

Who it is for

It suits organizations, schools, churches, public offices and personal domain owners who use standard SMTP servers for domains they own. It is not intended for consumer Gmail or Hotmail accounts.

What is good

Filters spam, phishing, malware and viruses.
Holds mail during server outages for up to 168 hours.
Syncs active addresses from Windows AD, LDAP or cPanel.
No charge for user or domain aliases.
No limit on email addresses or messages received.

What to know first

Does not support consumer Gmail or Hotmail accounts.
Quarantine retention is seven days.
Costs 0.25 USD per email address per month.
Free service requires visible website links to earn tokens.

Verdict

MX Guarddog combines inbound threat filtering with mail holding during server outages, without requiring local installation or configuration changes. Check that your email setup uses a supported SMTP server and consider the per-address charge when evaluating the paid plan.

MX Guarddog plans and pricing

All plans

Per Email Address Pricing $0.25/mo $0.25 per email address, per month; no charge for user aliases or domain aliases. No limit on email addresses or messages; free user aliases; unlimited quarantine storage mxguarddog.com · 3 Oct 2026

Compared on email anti-spam software

Free plan: Yesmxguarddog.com
Phishing detection: Yesmxguarddog.com
Malware scanning: Yesmxguarddog.com
Quarantine access: user_and_adminmxguarddog.com
Supported mail platforms: Standard SMTP email servers for owned domains; not consumer Gmail or Hotmail accountsmxguarddog.com
Quarantine retention: 7 daysmxguarddog.com
Deployment type: cloud_gatewaymxguarddog.com

Facts

Email filtering: MX Guarddog scans incoming email for spam, phishing, malware, and viruses, quarantines offending messages, and forwards clean mail to the customer’s server.mxguarddog.com · 3 Oct 2026
Hosted service: The cloud based service requires no hardware or software installation and no configuration changes to email clients or the server.mxguarddog.com · 3 Oct 2026
Encryption: The service says it uses Transport Layer Security encryption, including Perfect Forward Security, for email traveling over the Internet.mxguarddog.com · 3 Oct 2026
Account syncing: MX Guarddog says it can automatically sync active email addresses from Windows AD, LDAP, or cPanel systems.mxguarddog.com · 3 Oct 2026
Mail outage protection: If a customer’s server is unavailable, MX Guarddog says it spools mail for up to 168 hours and delivers it when the server is back online.mxguarddog.com · 3 Oct 2026
Quarantine reports: The service sends users quarantine reports summarizing stopped spam, and users can adjust their report preferences.mxguarddog.com · 3 Oct 2026
Filtering technology: The company says its servers use mailbox activity to maintain a real-time blocklist that identifies and stops spam.mxguarddog.com · 3 Oct 2026
Service availability: The SLA commits to commercially reasonable efforts to maintain at least 99.95% uptime over a trailing 30-day period and offers a service credit if the commitment is missed.mxguarddog.com · 3 Oct 2026
Support: End users are directed to contact their email administrator, while domain administrators can contact the MX Guarddog postmaster for technical help.mxguarddog.com · 3 Oct 2026
Intended customers: The company describes the service as suitable for organizations, schools, churches, police and government offices, and personal domain owners.mxguarddog.com · 3 Oct 2026
Free service option: Customers can earn tokens by placing visible MX Guarddog text links on a website and use those tokens to pay invoices.mxguarddog.com · 3 Oct 2026
Billing limits: The pricing page says there is no limit on the number of email addresses or messages a customer can receive.mxguarddog.com · 3 Oct 2026