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MX Guarddog
What it is
MX Guarddog is a cloud email gateway for standard SMTP servers serving owned domains. It checks incoming messages for spam, phishing, malware, and viruses, places offending mail in quarantine, and forwards clean messages to the customer’s server. The hosted service requires no hardware or software installation and no changes to email clients or the server. It can synchronize active addresses from Windows AD, LDAP, or cPanel systems. If a customer server is unavailable, MX Guarddog says it stores mail for up to 168 hours and delivers it after recovery. Users receive quarantine reports and can adjust report preferences; quarantine retention is seven days. The service says it uses Transport Layer Security with Perfect Forward Security for email in transit. Pricing is $0.25 per email address per month, with no charge for user or domain aliases, and a 30-day trial is listed. A free option can be earned through visible MX Guarddog links on a website. Consumer Gmail and Hotmail accounts are not supported.
For and against
For
- Filters spam, phishing, malware, and viruses
- Requires no installation or mail-server changes
- Stores mail for up to 168 hours during outages
- Syncs addresses from AD, LDAP, or cPanel
- Includes a 30-day trial
Against
- Does not support consumer Gmail or Hotmail accounts
- Costs $0.25 per email address per month
- Quarantine retention is seven days
- Free service requires visible website links
The verdict
MX Guarddog provides hosted filtering, quarantine, and outage mail storage for owned-domain SMTP systems. Its pricing, trial, free-link option, and account-platform limits should be reviewed before choosing it.
Who it suits
It is intended for organizations, schools, churches, police and government offices, and personal owners of domains using standard SMTP servers. It suits customers seeking hosted filtering without installing mail hardware or software.
Plans and prices
Per Email Address Pricing
No limit on email addresses or messages; free user aliases; unlimited quarantine storage
Read 3 Oct 2026 · mxguarddog.com
On the record
- Account syncing
- MX Guarddog says it can automatically sync active email addresses from Windows AD, LDAP, or cPanel systems.mxguarddog.com · read 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 · read 3 Oct 2026
- 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 · read 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 · read 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 · read 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 · read 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 · read 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 · read 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 · read 3 Oct 2026
- Quarantine reports
- The service sends users quarantine reports summarizing stopped spam, and users can adjust their report preferences.mxguarddog.com · read 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 · read 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 · read 3 Oct 2026
