online checks list

hi all, this is a list of useful online checks for websites, emails, dns and server we have a broad range from performance to security

global best practise

Internet.nl is an initiative of the Internet community and the Dutch government https://en.internet.nl/ security at its best https://www.hardenize.com/ https://dnsspy.io/scan/

wichtige Webseiten Performance Tests

Google Webseiten Test

https://pagespeed.web.dev/

GTMetrix

https://gtmetrix.com/

Pingdom Speedtest

https://tools.pingdom.com/

HTTP/2 Online Check

https://tools.keycdn.com/http2-test

Gzip / Brotli Check

https://www.giftofspeed.com/gzip-test/

Email / SMTP

https://geekflare.com/de/smtp-testing-tools/ https://tls.imirhil.fr/

Mail Server Checker

https://de.ssl-tools.net/mailservers https://www.secumail.de/mailserveranalyse/ https://www.emailsecuritygrader.com

Spam & Blacklists

http://multirbl.valli.org/lookup/ https://spameatingmonkey.com/lookup

IP Reputation

https://talosintelligence.com/

DNS/SSL Checker

https://www.ultratools.com/tools/dnsLookup https://dnschecker.org/ https://www.experte.de/dns-check https://toolbox.googleapps.com/apps/dig/#ANY/

SPF Checker

https://www.spf-record.de/

DMARC Analyser

https://us.dmarcian.com/xml-to-human-converter/

Dane Sec Checker

https://dane.sys4.de/

MTA-STS Checker

https://esmtp.email/tools/mta-sts/

DNSSEC Checker/Debugger

https://dnssec-debugger.verisignlabs.com/