With your own domain? Make sure you’ve got an the SPF, DKIM set up correctly, and register your domain with gmail’s postmaster tools. I moved my domain recently

With your own domain? Make sure you’ve got an the SPF, DKIM set up correctly, and register your domain with gmail’s postmaster tools. I moved my domain recently, and had completely forgotten about all that stuff I’d set up years ago. Started losing mails, redid the setup