DMarcus — dmarc.mx Email Security Checker icon

DMarcus — dmarc.mx Email Security Checker

by Schmug · dmarc.mx · Developer Tools
Established publisherManifest V3 Free
View in Chrome Web Store Data as of 15 Oct 2026

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

Users
3
0 in 30 days
Rating
0.0 / 5
unchanged in 30 days
Ratings
0
0 in 30 days
Store rank
#343K
#265K among extensions
Version
0.1.0
updated 19 May 2026

Users

monthly, 5 months
023May 2026Aug 2026Oct 2026
Latest, 15 Oct 2026: 3 usersMove the mouse over the chart for any month

Ratings count

monthly, 5 months
001May 2026Aug 2026Oct 2026
Latest, 15 Oct 2026: 0 ratingsMove the mouse over the chart for any month

The Chrome Web Store rounds user counts down to the leading digit, so the user line moves in steps. The ratings count is exact and is the better signal of real adoption.

About DMarcus — dmarc.mx Email Security Checker

Quick, open source email security analyzer.

Growth

WindowUsersChangeRatingsRating
7 days0+0.0%00.00
30 days0+0.0%00.00

Version history

1 versions recorded
0.1.019 May 2026

Details

Category
Developer Tools
First seen
19 May 2026
Size
69 KB
Languages
en
Pricing
Free
Privacy policy
dmarc.mx
Support
github.com
Extension ID
odoepcjbdoomjpkkifcfampdiohmkicc

Permissions and risk

Elevated riskimpact 4, likelihood 2
Permissions
storageactiveTabtabscontextMenus
Site access
https://cloudflare-dns.com/*https://dns.google/*https://*/.well-known/mta-sts.txthttps://*/.well-known/security.txthttps://*/security.txt

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