DMarcus — dmarc.mx Email Security Checker

Overview

Check any domain's email security (DMARC, SPF, DKIM, BIMI, MX, MTA-STS) client-side via DNS-over-HTTPS. No server, no tracking.

Quick, open source email security analyzer.

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Details

Version
0.1.0
Updated
May 19, 2026
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Size
69.1KiB
Languages
English
Developer
Website
Email
support@cortech.online
Non-trader
This developer has not identified itself as a trader. For consumers in the European Union, please note that consumer rights do not apply to contracts between you and this developer.

Privacy

Manage extensions and learn how they're being used in your organization

The developer has disclosed that it will not collect or use your data. To learn more, see the developer’s privacy policy.

This developer declares that your data is

Not being sold to third parties, outside of the approved use cases
Not being used or transferred for purposes that are unrelated to the item's core functionality
Not being used or transferred to determine creditworthiness or for lending purposes

Support

Censys

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Voidly Secure Inbox (beta)

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Experimental secure mailbox client for Voidly users.

Mbox Viewer by Cloud Captains

4.0

Mbox Viewer: secure, private, offline Mbox/EML/EMLX/Maildir viewer. Forensic analysis, search, bulk export. 100% local.

Zoho Mail Safe Domains - Anti-Phishing Protection

5.0

Protect yourself from email spoofing attacks. Identify safe organization domains and detect sender-reply-to mismatches in Zoho Mail.

Email Tracker + Pixelblock Detector & Blocker

4.6

Find out if your emails get read + pixelblock. Free & unlimited email tracking for Gmail, Outlook, Hotmail, Office 365 & Yahoo Mail

HawkShield Gmail Protection (poc)

5.0

Secure emails with encryption, expiring access, revocation, and quick threat detection for top security.

Email Shield

5.0

AI-powered email security. Detects phishing, spam, and suspicious senders with real-time URL threat inspection.

Origin IP Lookup

0.0

Find the real server IP behind Cloudflare, Fastly and other CDNs. DNS lookup, cert transparency, subdomain probing, IP intelligence.

Email Extractor - Website Email Finder

5.0

Email extractor and website email finder with bulk scanning. Extract emails, scan multiple URLs, filter results, and export to CSV.

Email Tracker by Mailtrack®

4.4

Free, unlimited email tracker for Gmail, trusted by millions. Accurate, reliable, GDPR-compliant, and Google-audited.

CyberGuard: HTTP Security Header & Vulnerability Scanner

0.0

Scan HTTP security headers, identify missing protections like CSP, HSTS, and XSS prevention.

Hosting Checker: Who is Hosting This?

4.7

Instantly see the IP address, DNS records, nameservers, and MX records for any website you visit — right in your browser.