customer.io current DNS records

A records

Amazon.com, Inc.
99.84.176.99   13,721
99.84.176.54   13,707
99.84.176.47   14,410
99.84.176.34   13,037

AAAA records

NO RECORDS

MX records

SOA records

ttl: 7,200
email: awsdns-hostmaster.amazon.com2,756,728

TXT

v=spf1 include:customeriomail.com include:helpscoutemail.com include:_spf.google.com include:servers.mcsv.net ~all
have-i-been-pwned-verification=a9d6f2edb8654dcfe04e310cdc9a000a
google-site-verification=HbwteWh_QF6HnNCDLL_1X_GRwURBkYEdFAVM00rxf_k

CNAME records pointed here1