Everything you need to protect your email
Eight protocols. One dashboard. Complete visibility into your domain's email security, with clear guidance on how to improve.
Complete Visibility
See every protocol, every sender, every issue, all from a single dashboard.
Actionable Guidance
Not just alerts. Step-by-step instructions with ready-to-use DNS records and clear explanations.
Safe by Design
We never touch your DNS. You get recommendations. You decide when and how to act.
Protect Your Sending Reputation
Make sure your emails reach the inbox, not the spam folder. These protocols prove you are who you say you are, and MailShield monitors all of them.
Control who can send email as your domain
SPF tells email providers which servers are authorized to send email on your behalf. Without it, anyone can send email pretending to be you.
- Catch duplicate records that silently break authentication
- Track DNS lookups to keep you under the 10-lookup limit
- Flag deprecated settings before they cause problems
- Validate your entire include chain end-to-end
- Recommend the right policy strength for your setup
Prove your emails haven't been tampered with
DKIM adds a cryptographic signature to your emails. Receivers use it to verify that your message arrived exactly as you sent it.
- Validate signing keys across multiple selectors
- Support modern key types for stronger security
- Track which selectors are actively in use
- Alert when keys are weak or about to expire
- Discover selectors automatically from DMARC reports
Stop attackers from impersonating your domain
DMARC ties SPF and DKIM together and tells email providers what to do when someone fails to prove they're authorized: deliver, quarantine, or reject.
- Guide you safely from monitoring to full enforcement
- Process aggregate reports automatically
- Show exactly who is sending email as your domain
- Track authentication success rates over time
- Alert when alignment issues put delivery at risk
Display your brand logo in email inboxes
BIMI shows your verified brand logo next to your emails in supporting clients like Gmail and Apple Mail, building trust before the recipient even opens your message.
- Validate your BIMI DNS record setup
- Check logo format and certificate requirements
- Preview how your logo will appear
- Monitor for configuration changes
- Guide you through the setup process
Secure Incoming Connections
Make sure email sent to your domain arrives securely and can't be intercepted or tampered with along the way.
Make sure incoming email reaches your servers
Your MX records tell other servers where to deliver email for your domain. We monitor them continuously to catch misconfigurations and certificate issues.
- Monitor all MX records and their priorities
- Verify TLS encryption is available on each server
- Alert when certificates are about to expire
- Check for proper redundancy and failover
- Detect unexpected configuration changes
Guarantee encrypted email delivery
MTA-STS prevents attackers from intercepting your incoming email by requiring encrypted connections. We host the policy for you. Just add two DNS records.
- Fully hosted, no web server required on your end
- Automatic HTTPS certificate management
- Start in testing mode, upgrade to enforce when ready
- Built-in DNS validation and monitoring
- One-click policy rotation
See when email encryption fails
TLS-RPT tells you when sending servers have trouble establishing encrypted connections to your mail servers, so you can fix issues before they affect delivery.
- Automatically process TLS failure reports
- Identify which senders have connection problems
- Track encryption success rates over time
- Spot certificate issues early
- Companion to MTA-STS for complete visibility
Protect your DNS from tampering
DNSSEC adds cryptographic signatures to your DNS, preventing attackers from forging responses. DANE takes it further by pinning your mail server's certificate in DNS.
- Validate your complete DNSSEC chain of trust
- Check DS records at the registry level
- Verify TLSA records for DANE compliance
- Monitor signing integrity continuously
- Alert when signatures are about to expire
Tools to manage security at scale
Built for teams managing multiple domains across organizations.
Security Scoring
One number that tells you where you stand. Track your domain's security posture over time and share progress with your team.
DMARC Reports
Automatically receive and process DMARC reports. See authentication results across all email providers in one place.
Team Management
Bring your whole team on board with role-based access. Everyone sees what matters, nobody changes what they shouldn't.
Multi-Domain
Monitor all your domains from a single dashboard. Built for agencies, MSPs, and organizations with complex email infrastructure.
Alerts & Notifications
Know the moment something changes. Get notified about score drops, DNS changes, and authentication failures instantly.
API Access
Integrate MailShield into your workflows with our REST API. Build custom monitoring, automate reporting, and more.
See where your domain stands
Get your security score in under a minute. Free plan includes 2 domains with all protocol checks.