Domains with DNS TXT v=spf1 include:_spf.mailersend.net a mx mx:fast-service.com.pl include:spf.protection.outlook.com -all
There is 1 domain that have DNS TXT set to v=spf1 include:_spf.mailersend.net a mx mx:fast-service.com.pl include:spf.protection.outlook.com -all.