Email deliverability is the single bane of my existence. If your using your own Office 365 (Not the GoDaddy Version) or an own exchange server that’s getting mail from contact forms or send mail services, add these records to your DNS as TXT to make sure they work.
Note to self:
TXT | v=spf1 mx include:secureserver.net -all
TXT | v=spf1 a mx ptr include:secureserver.net ~all
TXT | Email: v=spf1 include:spf.protection.outlook.com -all