What powers sendmarc.com?
Last seen Oct 2026 · 47 technologies across 22 categories
Advertising
Analytics
CDN
CMS
Cookie compliance
Development
Font scripts
Issue trackers
JavaScript frameworks
JavaScript graphics
JavaScript libraries
Live chat
LMS
Marketing automation
Miscellaneous
Performance
Programming languages
Security
Tag managers
UI frameworks
Web frameworks
Webmail
AI Crawlers
Blocks all crawlers by default in robots.txt (User-agent: *). Checked Nov 2026. A recent check saw a policy file missing; awaiting confirmation.
- robots.txt found
- llms.txt not found
- ai.txt not found
- Oct 2026 *: Blocked (was Allowed)
- Sep 2026 *: Allowed (was Restricted)
- Aug 2026 *: Restricted (was Allowed)
Top search keywords
| Keyword | Position | Est. monthly visits |
|---|---|---|
| header analyzer | #4 | 96 |
| email header analyzer | #12 | 33 |
| dmarc | #95 | 25 |
| spf check tool | #33 | 21 |
| dkim | #59 | 17 |
| check dmarc record | #11 | 12 |
| test dmarc record | #12 | 10 |
| spf checker | #13 | 8 |
| bimi | #46 | 8 |
| what does queued mean in gmail | #46 | 8 |
| hubspot spf | #5 | 7 |
| analyze headers | #7 | 7 |
| dkim check | #34 | 7 |
| decrypt email header | #4 | 6 |
| dmarc test | #13 | 6 |
| microsoft dmarc requirement | #2 | 5 |
| hubspot spf record | #6 | 5 |
| email analyzer | #8 | 5 |
| queued gmail meaning | #41 | 4 |
| queued meaning in gmail | #42 | 4 |
| data breach check | #70 | 4 |
| email header parser | #7 | 3 |
| salesforce dkim setup | #9 | 3 |
| dmarc generator | #31 | 3 |
| domain score checker | #76 | 3 |
The site's top keywords in Google (US), with the visits each one is estimated to bring per month.
Top backlinks
Top links pointing at the site, one per source domain, strongest first. The anchor text opens the page carrying the link.
AI Crawlers
All crawlers blocked
Audience
- 65% phone
- 33% desktop
- 2% tablet
United States
South Africa
India
United Kingdom
Australia
Mexico
Where the site's Chrome visitors come from, largest estimated audience first.
Open Page Rank
5.04 / 10 · ranked #242,279 of all domains
112 referring domains · OpenPageRank
Search traffic
400 est. monthly organic visits (US)
370 keywords in Google's top 30
Core Web Vitals
| LCP | 1.8 s |
| INP | 175 ms |
| CLS | 0 |
| TTFB | 900 ms |
Real user p75, Chrome UX Report, Sep 2026.
Page
- Language: English
- CDN: Cloudflare
- Weight: 1.9 MB · 96 requests
- Structured data: JSON-LD, OpenGraph, Twitter Cards
Homepage as crawled by the HTTP Archive, Oct 2026.
Organisation
- Sendmarc
From the homepage's own structured data (Oct 2026).
Infrastructure
- Registered Apr 2017 (9 years) via Cloudflare, Inc., renews Apr 2027
- Hosted on Cloudflare (104.18.6.11, IPv6)
- DNS: sendmarc.net
- Email: Microsoft 365
- Email security: SPF, DMARC reject, DNSSEC signed, CAA, MTA-STS, BIMI
- SSL: Google Trust Services, ECDSA P256, wildcard, expires Nov 2026
- Common Crawl link graph: rank 1,942,531, 12 hosts
- Verified with: Apple Business, Google, Notion, OpenAI, Slack
DNS records as swept Nov 2026, certificate as seen Nov 2026, registration from the registry's RDAP service. How the web is hosted
Subdomains
| Host | Techs |
|---|---|
| signup.sendmarc.com | 23 |
| sendmarc.com | 20 |
| tools.sendmarc.com | 20 |
| academy.sendmarc.com | 15 |
| connect.sendmarc.com | 15 |
| help.sendmarc.com | 14 |
| portal.sendmarc.com | 12 |
Full technology history →
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Recent changes
- dropped Elementor Oct 2026
- dropped Hello Elementor Oct 2026
- dropped HubSpot Analytics Oct 2026
- dropped HubSpot WordPress plugin Oct 2026
- dropped Microsoft Clarity Oct 2026
- dropped MySQL Oct 2026
- dropped Perfmatters Oct 2026
- dropped PHP Oct 2026
- detected PostHog Oct 2026
- dropped RankMath SEO Oct 2026
- dropped RSS Oct 2026
- dropped Swiper Oct 2026
- dropped Weglot Oct 2026
- dropped WordPress Oct 2026
- dropped WP Rocket Oct 2026
- dropped YouTube Oct 2026
- detected AngularJS Sep 2026
- dropped LiveIntent Sep 2026
- dropped Azure Jul 2026
- dropped Azure Front Door Jul 2026
- dropped jQuery UI Jul 2026
- dropped Nginx Jul 2026
- detected Azure May 2026
- detected Azure Front Door May 2026
- detected jQuery UI May 2026
- detected Nginx May 2026
- dropped jQuery UI Apr 2026
- detected LiveIntent Apr 2026
- detected Turbopack Apr 2026
- dropped Embed Optimizer Dec 2025
- dropped Image Placeholders Dec 2025
- dropped Image Prioritizer Dec 2025
- dropped Modern Image Formats Dec 2025
- dropped Optimization Detective Dec 2025
- dropped Performance Lab Dec 2025
- detected RSS Dec 2025
- dropped Speculative Loading Dec 2025