Question and response
Question
dig _spf.eu.mailgun.org. TXT
Answer
_spf.eu.mailgun.org. 60 TXT "v=spf1 ip4:141.193.32.0/23 ip4:159.135.140.80/29 ip4:159.135.132.128/25 ip4:161.38.204.0/22 ip4:87.253.232.0/21 ip4:185.189.236.0/22 ip4:185.211.120.0/22 ip4:185.250.236.0/22 ip4:143.55.236.0/22 ip4:198.244.60.0/22 ip4:204.220.160.0/21 ~all"
Authority
eu.mailgun.org. 172800 NS ns-1452.awsdns-53.org.
eu.mailgun.org. 172800 NS ns-2026.awsdns-61.co.uk.
eu.mailgun.org. 172800 NS ns-508.awsdns-63.com.
eu.mailgun.org. 172800 NS ns-619.awsdns-13.net.
Additional
. 0 OPT ; payload 4096, xrcode 0, version 0, flags 0