$ resolve -a arcticadder.net -k protonmail
arcticadder.net
138.68.92.134

MX:
20 mailsec.protonmail.ch.
10 mail.protonmail.ch.

DMARC:
v=DMARC1; p=none

DKIM protonmail:
v=DKIM1;k=rsa;p=MIIBIjANBgkqhkiG9w0BAQEFAAOCAQ8AMIIBCgKCAQEA3pJnwplOy7b4VCVgGpSPjjJy8iR2jDUDFG8Qc/GbwDTWr3gwFrlkjgptjGz/+wxhCrOzfQ3ZXV0Mr91Yn8GBDJw9dAguBJOTh4eKTiiNKbEeFYdjjUJJ2ZLx1DHUZfcr+dWfg1g75dhVYBSWKFv0hWVEX/Y+u016DNY7512LSsmamGBcbHcSxXE4F4Ec82QEpa3AgPkLWlRrkyvhKmqaWml88hktB8vzfGCD/1MFA2cKuoI/rjSKmPpOnObVTPzhF+7dOjysmevEc2iQRBCaG36DTxA6Q508ea9zEByHxJy39p5XsdLfMbLKttetCszudQS8v0q4bZTLFnOPZw4KhwIDAQAB;

TXT:
v=spf1 include:_spf.protonmail.ch mx ~all
protonmail-verification=addd5b94caa7dc23f7c3760c5f3d508818568bcf

TXT redirect (_spf.protonmail.ch):
v=spf1 ip4:185.70.40.0/24 ip4:185.70.41.0/24 ip4:185.70.43.0/24 ip4:79.135.106.0/24 ip4:79.135.107.0/24 ip4:109.224.244.0/24 include:_spf2.protonmail.ch ~all

TXT redirect (_spf2.protonmail.ch):
v=spf1 ip4:85.9.206.169 ip4:85.9.210.45 ip4:188.165.51.139 ip4:57.129.93.249 ~all

SPF IPs:
185.70.40.0/24
185.70.41.0/24
185.70.43.0/24
79.135.106.0/24
79.135.107.0/24
109.224.244.0/24
85.9.206.169
85.9.210.45
188.165.51.139
57.129.93.249