Hi, The European Commission lately launched a tool called "My Email Communications Security Assessment (MECSA)". It also checks for DANE records. See: https://mecsa.jrc.ec.europa.eu/ There are others tools as well which are testing for DANE records on receiving mailservers (inbound) like https://internet.nl (an initiative of the Dutch Internet community and government). See for example the following test report: https://en.internet.nl/mail/internet.nl/69612/#control-panel-20 And of course there is https://dane.sys4.de that checks DANE records. For testing DANE validation when sending mail (outbound) you could use https://havedane.net/ -- Best regards, Bart Knubben