version: STSv1
mode: testing
mx: mxb.mailgun.org
mx: mxa.mailgun.org
mx: alt2.aspmx.l.google.com
mx: alt1.aspmx.l.google.com
mx: aspmx.l.google.com
mx: aspmx3.googlemail.com
mx: aspmx2.googlemail.com
max_age: 604800