mail servisleri

https://www.appmaildev.com/

https://mxtoolbox.com/

 

https://dmarc.org/resources/deployment-tools/

DKIM 

https://dmarcian.com/dkim-validator/

https://dkimcore.org/c/keycheck

 

https://dnschecker.org/

https://checkcybersecurity.service.ncsc.gov.uk/email-security-check/results?domain=icgconsultant.com

https://toolbox.googleapps.com/apps/checkmx/check?domain=icgconsultant.com&dkim_selector=

How to Turn On End-to-End Encryption in Gmail | Set up MTA-STS using your Google Admin Console