version: STSv1 mode: testing mx: aspmx.l.google.com mx: alt1.aspmx.l.google.com mx: alt2.aspmx.l.google.com mx: alt3.aspmx.l.google.com mx: alt4.aspmx.l.google.com mx: mxa.mailgun.org mx: mxb.mailgun.org max_age: 86400