I am seeing an uptick in Gmail spam. My emails are mostly Kohls and Yeti giveaways. SPF pass/fail is a mix. Most messages appear to originate from a Microsoft h

I am seeing an uptick in Gmail spam. My emails are mostly Kohls and Yeti giveaways. SPF pass/fail is a mix. Most messages appear to originate from a Microsoft hostname. I wonder if these are compromised O365 accounts.