Question and response
Question
dig protonmail.ch. MX
Answer
protonmail.ch. 1200 MX 5 mail.protonmail.ch.
protonmail.ch. 1200 MX 10 mailsec.protonmail.ch.
Authority
protonmail.ch. 1200 NS ns3.protonmail.ch.
protonmail.ch. 1200 NS ns2.protonmail.ch.
protonmail.ch. 1200 NS ns1.protonmail.ch.
Additional
mail.protonmail.ch. 1200 A 176.119.200.128
mail.protonmail.ch. 1200 A 185.70.42.128
mail.protonmail.ch. 1200 A 185.205.70.128
mailsec.protonmail.ch. 1200 A 176.119.200.129
mailsec.protonmail.ch. 1200 A 185.70.42.129
mailsec.protonmail.ch. 1200 A 185.205.70.129
ns1.protonmail.ch. 1200 A 185.70.42.150
ns2.protonmail.ch. 1200 A 176.119.200.150
ns3.protonmail.ch. 1200 A 205.132.47.1
_25._tcp.mail.protonmail.ch. 1200 TLSA 3 1 1 6111A5698D23C89E09C36FF833C1487EDC1B0C841F87C49DAE8F7A09E11E979E
_25._tcp.mail.protonmail.ch. 1200 TLSA 3 1 1 76BB66711DA416433CA890A5B2E5A0533C6006478F7D10A4469A947ACC8399E1
_25._tcp.mailsec.protonmail.ch. 1200 TLSA 3 1 1 6111A5698D23C89E09C36FF833C1487EDC1B0C841F87C49DAE8F7A09E11E979E
_25._tcp.mailsec.protonmail.ch. 1200 TLSA 3 1 1 76BB66711DA416433CA890A5B2E5A0533C6006478F7D10A4469A947ACC8399E1
. 0 OPT ; payload 1232, xrcode 0, version 0, flags 0