| 216.239.32.21 |
| 216.239.34.21 |
| 216.239.36.21 |
| 216.239.38.21 |
| 10 alt1.gmr-smtp-in.l.google.com. |
| 10 mxa.mailgun.org. |
| 10 mxb.mailgun.org. |
| 20 alt2.gmr-smtp-in.l.google.com. |
| 30 alt3.gmr-smtp-in.l.google.com. |
| 40 alt4.gmr-smtp-in.l.google.com. |
| 5 gmr-smtp-in.l.google.com. |
| ns-cloud-d1.googledomains.com. |
| ns-cloud-d2.googledomains.com. |
| ns-cloud-d3.googledomains.com. |
| ns-cloud-d4.googledomains.com. |
| v=spf1 include:mailgun.org ~all |