#DNS & Mail Tools

[DNS records](https://www.nslookup.io)  
[email: TLS tester](https://www.checktls.com/TestReceiver)  
[Lookup - SPF-Record](https://www.spf-record.de/spf-lookup)  
[mail Tester](https://www.mail-tester.com/)  
[MultiRBL - Blacklist check tool](https://multirbl.valli.org/)  
[MX Lookup Tool](https://mxtoolbox.com/)  
[spambarrier Cloud AntiSpam](https://www.spambarrier.de/)  
[SPF Generator](https://www.eunetic.com/de/p/toolbox/mx-tools/spf-generator)