Question and response
Question
dig em4service.cz. MX
Answer
em4service.cz. 1800 MX 5 mail.em4service.cz.
Authority
The response has no authority records.
Additional
mail.em4service.cz. 1800 A 5.182.149.4
. 0 OPT ; payload 1232, xrcode 0, version 0, flags 0