Now you can quickly view your DomainKeys, DKIM, and SPF validitay, and SpamAssassin score in one place.
Spam Blacklist checks for a given IP
Scan service from Mozilla to analyze the security of web pages/sites
HTTPS certificate chain check if weak sha-1 cipher is used
testssl.sh is a free command line tool which checks a server's service on any port for the support of TLS/SSL ciphers, protocols as well as recent cryptographic flaws and more.
Sicherheitseinstellung und protokolle bei Webbrowsern überprüfen
Test your client SSL/TLS settings and cipher specs