unverified emails from buyers

[couplemate]

Hello,

Since the last update we have had trouble with emails.

Orders marked as unverified and going to junk files
Mail Chimp is broken and not sending our deals
Cart Abandonment emails are broken.

couplemate.com.au is from a Microsoft Server. We checked extensively with Microsoft and our host server.

We changed the email address in WooCOmmerce with emails still going to junk.

We have some 20 email addresses outside Woocommerce and all are acting normally.

Could you check your end please.