Technical Information
| HTTP Status Code | 200 |
| HTTP Version | HTTP/1.1 |
| HTTPS | ✔ Available |
| IP Address | 52.51.118.159 |
| Server Software | nginx |
| Compression | gzip |
|
🔒 🟡 Mixed Content (3 HTTP resources) | The page is served over HTTPS but loads 3 resource(s) over HTTP. This may be blocked in modern browsers. |
HTTP Status Code 200
HTTP Version HTTP/1.1
HTTPS ✔ Available
IP Address 52.51.118.159
Server Software nginx
Compression gzip
🔒 🟡 Mixed Content (3 HTTP resources) The page is served over HTTPS but loads 3 resource(s) over HTTP. This may be blocked in modern browsers.
Redirect Chain
| # | URL | HTTP Status Code | Status |
| 1 | https://mailtrack.io:443 | 301 | HTTP/2 301 |
| 2 | https://mailsuite.com/ | 302 | HTTP/2 302 |
| 3 | https://mailsuite.com/en/ | 200 | HTTP/2 200 |
#1 URL https://mailtrack.io:443
HTTP Status Code 301
Status HTTP/2 301
#2 URL https://mailsuite.com/
HTTP Status Code 302
Status HTTP/2 302
#3 URL https://mailsuite.com/en/
HTTP Status Code 200
Status HTTP/2 200
Performance
| DNS Lookup | 4.1 ms |
| TCP Connect | 21.1 ms |
| TLS Handshake | 19.9 ms |
| Time To First Byte (TTFB) | 115.8 ms |
| Content Download | 17.2 ms |
| Total Response Time | 133.1 ms |
DNS Lookup 4.1 ms
TCP Connect 21.1 ms
TLS Handshake 19.9 ms
Time To First Byte (TTFB) 115.8 ms
Content Download 17.2 ms
Total Response Time 133.1 ms
Security
| HTTPS | ✔ Enabled |
| HSTS | ✔ max-age=31536000; |
| CSP | ✔ Configured |
| X-Frame-Options | ✔ deny |
| X-Content-Type-Options | ✔ nosniff |
| HTTP/2 | ⚠ HTTP/1.1 |
HTTPS ✔ Enabled
HSTS ✔ max-age=31536000;
CSP ✔ Configured
X-Frame-Options ✔ deny
X-Content-Type-Options ✔ nosniff
HTTP/2 ⚠ HTTP/1.1
SEO Quick Check
| Title | Email Tracker for Gmail — Mailtrack® by Mailsuite |
| Meta Description | Mailtrack® by Mailsuite — the original email tracker for Gmail since 2013. Free, unlimited read receipts with double check marks (✓✓). 14M+ users. |
| Canonical | https://mailsuite.com/en/ |
Title Email Tracker for Gmail — Mailtrack® by Mailsuite
Meta Description Mailtrack® by Mailsuite — the original email tracker for Gmail since 2013. Free, unlimited read receipts with double check marks (✓✓). 14M+ users.
Canonical https://mailsuite.com/en/
Detected Technologies
| Technology | Google Analytics Google Tag Manager Cloudflare Nginx Stripe Hotjar |
Technology Google Analytics Google Tag Manager Cloudflare Nginx Stripe Hotjar
HTTP Headers
| Date
| Thu, 20 Aug 2026 18:28:07 GMT |
| Content-type
| text/html; charset=UTF-8 |
| Server
| nginx |
| Cache-control
| max-age=0, must-revalidate, private |
| X-frame-options
| deny |
| Expires
| Thu, 20 Aug 2026 18:28:07 GMT |
| X-content-type-options
| nosniff |
| X-xss-protection
| 1; mode=block |
| Content-security-policy
| default-src https: blob: 'unsafe-inline' https://*.hotjar.com:* https://*.hotjar.io:* wss://*.hotjar.com *.crazyegg.com https://mailtrack.me ; script-src 'self' 'unsafe-inline' https://dev.visualwebsiteoptimizer.com https://www.google-analytics.com https://embed.typeform.com https://d5phz18u4wuww.cloudfront.net https://cdnjs.cloudflare.com https://seal.digicert.com https://js.stripe.com https://www.googleadservices.com https://billing.quaderno.io https://www.gstatic.com https://s3-eu-west-1.amazonaws.com https://snap.licdn.com https://px.ads.linkedin.com https://www.linkedin.com https://d1fc8wv8zag5ca.cloudfront.net https://*.hotjar.com https://cdn.jsdelivr.net/gh/snowplow https://connect.facebook.net https://www.googletagmanager.com https://*.cookiebot.com *.crazyegg.com https://analytics.tiktok.com https://mailtrack.me ; img-src 'self' data: https://dev.visualwebsiteoptimizer.com https://www.google-analytics.com https://stats.g.doubleclick.net https://www.google.es https://www.google.com https://mailtrackio.typeform.com https://www.googleadservices.es https://www.googleadservices.com https://googleads.g.doubleclick.net https://seal.digicert.com https://billing.quaderno.io https://s3-eu-west-1.amazonaws.com https://dc.ads.linkedin.com https://d1ptrxl5bj7757.cloudfront.net https://analytics-v2.mailtrack.io https://px.ads.linkedin.com https://www.linkedin.com https://www.facebook.com/tr/ https://www.facebook.com/privacy_sandbox/ https://www.googletagmanager.com https://templates-images-dev.s3.eu-west-1.amazonaws.com https://templates-images-prod.s3.eu-west-1.amazonaws.com https://*.cookiebot.com *.crazyegg.com https://mailtrack.me https://mt-video-dev.s3.eu-west-1.amazonaws.com https://mt-video-prod.s3.eu-west-1.amazonaws.com https://maildoc-dev.s3.eu-west-1.amazonaws.com https://maildoc.s3.eu-west-1.amazonaws.com https://mailtrack.zendesk.com ; object-src 'none'; font-src 'self' https://fonts.gstatic.com https://netdna.bootstrapcdn.com https://cdnjs.cloudflare.com https://s3-eu-west-1.amazonaws.com https://mailtrack.me ; worker-src blob: https://mailsuite.me https://mailsuite.com ; media-src 'self' data: blob: https://mailtrack.me https://mt-video-dev.s3.eu-west-1.amazonaws.com https://mt-video-prod.s3.eu-west-1.amazonaws.com ; |
| Strict-transport-security
| max-age=31536000; |
| Content-encoding
| gzip |
Meta Tags
| X-UA-Compatible | IE=edge,chrome=1 |
| Description | Mailtrack® by Mailsuite — the original email tracker for Gmail since 2013. Free, unlimited read receipts with double check marks (✓✓). 14M+ users. |
| Viewport | width=device-width, initial-scale=1.0 |
| Dark-theme | 0 |
Date Thu, 20 Aug 2026 18:28:07 GMT
Content-type text/html; charset=UTF-8
Server nginx
Cache-control max-age=0, must-revalidate, private
X-frame-options deny
Expires Thu, 20 Aug 2026 18:28:07 GMT
X-content-type-options nosniff
X-xss-protection 1; mode=block
Content-security-policy default-src https: blob: 'unsafe-inline' https://*.hotjar.com:* https://*.hotjar.io:* wss://*.hotjar.com *.crazyegg.com https://mailtrack.me ; script-src 'self' 'unsafe-inline' https://dev.visualwebsiteoptimizer.com https://www.google-analytics.com https://embed.typeform.com https://d5phz18u4wuww.cloudfront.net https://cdnjs.cloudflare.com https://seal.digicert.com https://js.stripe.com https://www.googleadservices.com https://billing.quaderno.io https://www.gstatic.com https://s3-eu-west-1.amazonaws.com https://snap.licdn.com https://px.ads.linkedin.com https://www.linkedin.com https://d1fc8wv8zag5ca.cloudfront.net https://*.hotjar.com https://cdn.jsdelivr.net/gh/snowplow https://connect.facebook.net https://www.googletagmanager.com https://*.cookiebot.com *.crazyegg.com https://analytics.tiktok.com https://mailtrack.me ; img-src 'self' data: https://dev.visualwebsiteoptimizer.com https://www.google-analytics.com https://stats.g.doubleclick.net https://www.google.es https://www.google.com https://mailtrackio.typeform.com https://www.googleadservices.es https://www.googleadservices.com https://googleads.g.doubleclick.net https://seal.digicert.com https://billing.quaderno.io https://s3-eu-west-1.amazonaws.com https://dc.ads.linkedin.com https://d1ptrxl5bj7757.cloudfront.net https://analytics-v2.mailtrack.io https://px.ads.linkedin.com https://www.linkedin.com https://www.facebook.com/tr/ https://www.facebook.com/privacy_sandbox/ https://www.googletagmanager.com https://templates-images-dev.s3.eu-west-1.amazonaws.com https://templates-images-prod.s3.eu-west-1.amazonaws.com https://*.cookiebot.com *.crazyegg.com https://mailtrack.me https://mt-video-dev.s3.eu-west-1.amazonaws.com https://mt-video-prod.s3.eu-west-1.amazonaws.com https://maildoc-dev.s3.eu-west-1.amazonaws.com https://maildoc.s3.eu-west-1.amazonaws.com https://mailtrack.zendesk.com ; object-src 'none'; font-src 'self' https://fonts.gstatic.com https://netdna.bootstrapcdn.com https://cdnjs.cloudflare.com https://s3-eu-west-1.amazonaws.com https://mailtrack.me ; worker-src blob: https://mailsuite.me https://mailsuite.com ; media-src 'self' data: blob: https://mailtrack.me https://mt-video-dev.s3.eu-west-1.amazonaws.com https://mt-video-prod.s3.eu-west-1.amazonaws.com ;
Strict-transport-security max-age=31536000;
Content-encoding gzip
