Forum Discussion
Exchange online SPF
I may be missing something basic here but can someone explain if I used the recommended spf include statement (v=spf1 include:spf.protection.outlook.com -all( (see here: https://docs.microsoft.com/en...
Only if you are sending via the ExO IP ranges, the ones listed when you expand spf.protection.outlook.com. Which Microsoft will only allow you to do for your own domain(s).