Check your SPF and DKIM keysCheck if your domain has these 2 email signatures set up and valid.
What's DKIM and SPF? They're 2 effective email signatures against spoofing, phishing or impersonation. When recipients receive your emails, their spam filters automatically poke your domain to see if those signatures are not forged.
https://www.mail-tester.com/spf-dkim-check
