IsMyEmailBlacklisted vs MXGuardDog
MXGuardDog sits in front of your mail server as a spam filter. IsMyEmailBlacklisted monitors the health of your sending infrastructure from the outside — catching blacklistings before they affect delivery.
| Feature | IsMyEmailBlacklisted | MXGuardDog |
|---|---|---|
| Blacklists checked | 60 | ~15 |
| Automated blacklist monitoring | ||
| SPF/DKIM/DMARC validation | ||
| SMTP health checks | ||
| Spam filtering (inbound) | ||
| Delisting playbooks | ||
| Email spoofing test | ||
| SMTP security scanner | ||
| Total free tools | 17 | 1 |
| Instant alerts (email/Slack/webhook) | Email only | |
| Health score dashboard | ||
| Free plan | 2 domains forever | Free tier (basic) |
| Starting price (monitoring) | $19/mo | $0–$15/mo |
Why teams choose IsMyEmailBlacklisted
60 blacklists vs ~15 — dramatically better coverage for outbound reputation monitoring
Purpose-built for outbound deliverability — MXGuardDog filters inbound spam
Full DNS authentication: SPF, DKIM, DMARC, SMTP diagnostics
17 free tools including email spoofing test, SMTP security scanner, and DNS recon
Step-by-step delisting playbooks for every blacklist
Real-time alerts via Slack, webhooks, and SMS — not just email
Deliverability health score tracks your infrastructure over time
Limitations of MXGuardDog
MXGuardDog filters inbound spam — it does not monitor your sending reputation
Only ~15 blacklists checked, missing critical lists like UCEPROTECT and SURBL
No SPF, DKIM, or DMARC validation
No delisting guidance — no help when you need to get removed
No SMTP security scanner or email spoofing test
No multi-channel alerts — limited to email notifications
Ready to switch?
Run a free scan right now and see the difference. No signup required.