MithiDocs

Step 2: Update SPF Records in DNS for O365 & SkyConnect Co-Existence

Update the DNS record for your domain to update the SPF TXT record with the following:

v=spf1 include:spf.protection.outlook.com include:mem.mithi.com -all

This ensure that servers which check SPF record for incoming mail will accept mail from your domain originating from the O365 and SkyConnect servers.