Question and response
Question
dig avcr.cz. MX
Answer
avcr.cz. 600 MX 10 avcr-cz.mail.protection.outlook.com.
Authority
avcr.cz. 600 NS nsa.ces.net.
avcr.cz. 600 NS visla.utia.cas.cz.
avcr.cz. 600 NS academy.cas.cz.
Additional
. 0 OPT ; payload 1472, xrcode 0, version 0, flags 0