Can someone talk to me about SPF validation? We have the Email Deliverability PowerPack (250ok)which shows whether DKIM and SPF are valid for each email send (among other things).
Every few sends, the 250ok tool shows our SPF as failing. However, when when I run the DSN check in the Marketo admin area, our DKIM and SPF are verified, and there are clicks and opens in the email performance report. Maybe I'm misunderstanding what the 250ok tool is supposed to be telling me. Maybe the seed list doesn't match our actual audience closely enough. Maybe something really is wrong with our SPF.
How can I troubleshoot this?