URL Inspection: https://mail.cs523.de

Open Cached · just now

UP

HTTP Status

200

Ping

111 ms

Technologies

2

Technologies Detected

Infrastructure & Network (1)

Web Server	Nginx Nginx is a high-performance, open-source web server and reverse proxy server.
Description: Nginx is a high-performance, open-source web server and reverse proxy server. It's known for its low memory footprint, high concurrency, and ability to handle large numbers of simultaneous connections. Nginx is widely used as a web server, load balancer, and reverse proxy for modern web applications. View full details
Evidence: • Header Server: nginx

SSL & Certificates (1)

Certificate Authority	Let's Encrypt Let's Encrypt is a free, automated, and open certificate authority run by the Internet Security Research Group (ISRG).
Description: Let's Encrypt is a free, automated, and open certificate authority run by the Internet Security Research Group (ISRG). It provides free SSL/TLS certificates to enable encrypted HTTPS on websites, making web security accessible to everyone. It's one of the most widely used certificate authorities globally. View full details
Evidence: • SSL Certificate Issuer: C=US, O=Let's Encrypt, CN=R12

Metadata & SEO

Title

Mailserver

Language

en-gb

Viewport

width=device-width, initial-scale=1, maximum-scale=1, user-scalable=0

Domain Owner Information

View Full WHOIS

SSL/TLS Certificate

View Full SSL Report

Issued By

C=US, O=Let's Encrypt, CN=R12

Security Score

87 /100

Resources

cs523.de (5 resources)

Scripts (1)

• https://mail.cs523.de/cache/97de29030b01af5b720989e26703fcf354efbcf2.js

Stylesheets (1)

• https://mail.cs523.de/cache/0c8d59052a2cc8feb77c40062ab79370107e4e7b.css

Images (2)

Forms (1)

• https://mail.cs523.de/

Inspected on December 27, 2025 at 01:40 UTC