Domains with DNS TXT v=spf1 a include:spf.protection.outlook.com ip4:82.100.26.27 a:mail.skylab.cz a:notify.myzone.cz -all
There is 1 domain that have DNS TXT set to v=spf1 a include:spf.protection.outlook.com ip4:82.100.26.27 a:mail.skylab.cz a:notify.myzone.cz -all.