Question and response
Question
dig _spf2.protonmail.ch. TXT
Answer
_spf2.protonmail.ch. 1200 TXT "v=spf1 ip4:85.9.206.169 ip4:85.9.210.45 ip4:188.165.51.139 ip4:57.129.93.249 ~all"
Authority
protonmail.ch. 1200 NS ns2.protonmail.ch.
protonmail.ch. 1200 NS ns3.protonmail.ch.
protonmail.ch. 1200 NS ns1.protonmail.ch.
Additional
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
. 0 OPT ; payload 1232, xrcode 0, version 0, flags 0