Your emails might be failing right now
Most organizations have no idea when their emails land in spam, get rejected, or are spoofed by attackers. MailShield gives you complete visibility and clear steps to fix what's broken.
SPF · DKIM · DMARC · MTA-STS · TLS-RPT · BIMI · DNSSEC · DANE
The risks you can't see
Email security fails silently. These problems could be costing you business right now, and you'd have no way to know.
- Your emails land in spam, or never arrive at all, and nobody tells you
- Anyone can send email pretending to be your domain, damaging your brand
- A single DNS misconfiguration can silently break delivery for weeks
- You have no way to know if your email security is actually working
Finally, visibility into what's actually happening
Right now, email providers like Google and Microsoft are making decisions about your emails: delivering them, flagging them as spam, or rejecting them entirely. MailShield shows you what they see, so you can take action before it costs you.
Not assumptions. Not "probably fine." Real data from the systems that decide whether your emails arrive.
Google passed your DMARC check
1,247 emails authenticated successfully today
Unknown sender detected
IP 198.51.100.42 sent 23 emails as your domain
SPF record changed
Lookup count increased from 8 to 11 (over limit)
From blind spots to full control
And MailShield doesn't stop at monitoring.
Every domain, one dashboard
Add your domains and see their security posture in seconds. Scores, protocol status, and issues, all on one screen. Group by team, filter by tag, and know exactly which domains need attention without checking them one by one.
Aggregate reports, zero effort
DMARC and TLS reports are processed automatically as they arrive. See volume trends, passing vs. failing ratios, and which senders are using your domain, without parsing XML yourself.
Stay ahead of every change
Get notified when your security score changes, DNS records are modified, or new DMARC reports arrive. Catch configuration drift and unauthorized senders before they cause deliverability problems.
One dashboard for your entire email security stack
Stop juggling multiple tools and manual checks. MailShield monitors all eight critical protocols from a single view, with clear recommendations on what to fix first.
Complete Protocol Coverage
All eight email security protocols monitored continuously. Know the moment a change breaks your authentication, before it affects delivery.
Automatic Report Processing
We receive and analyze your DMARC reports automatically. See who's sending email as your domain and spot unauthorized senders instantly.
Instant Security Score
A single score that tells your entire team where you stand. Share it with leadership, track it over time, and celebrate when it improves.
Step-by-Step Guidance
Not just alerts: actionable next steps with ready-to-use DNS records. Move from monitoring to full protection safely and confidently.
Real-Time Alerts
Score drops, DNS changes, authentication failures: get notified the moment something needs attention, not weeks later.
Built for Teams
Invite your team, assign roles, manage multiple domains. Everyone stays on the same page about your email security posture.
We tell you exactly what to do
No guesswork. No hunting through documentation. MailShield gives you specific, actionable next steps:
Specific steps. Ready-to-use records. Clear explanations of what each change does and why.
You stay in control.
Your email, your control
Other tools make changes behind your back. MailShield gives you recommendations. You decide what to implement and when.
- We never touch your DNS. You approve every change
- No silent policy upgrades that could break your mail flow
- Every recommendation comes with a clear explanation of why and what happens next
- Built for production environments where mistakes have real consequences
Built for
- Hosting providers managing email for hundreds of clients
- MSPs responsible for their customers' email reputation
- IT teams who need to prove email compliance to leadership
Trusted by teams running real-world infrastructure, including the complex setups.
How It Works
Add Your Domain
Enter your domain and get an instant security assessment across all eight email protocols, in under a minute.
See Where You Stand
Get a clear security score with a breakdown of what's working and what needs immediate attention.
Fix & Monitor
Follow step-by-step recommendations to fix issues, then let MailShield monitor continuously and alert you to changes.
See your email security score in 60 seconds
Add your domain and instantly see what's working, what's broken, and exactly how to fix it. No credit card required.
Start free with 2 domains. No credit card required.