I have a domain that is used for family emails, 4 email addresses. Google decided they were going to strt charging so I decided to move to MS365. I've migrated everything but there's still some emails appearing in the google mailboxes, not very many and mostly from a couple of senders.

Clearly mx records must be setup correctly because 99.9% of emails are being routed correctly, I'm at a loss as to why this is happening.

Has anybody had similar issues?