Sending Emails -- You need a psychical email address when you send emails from your website.

https://pipeline.zoominfo.com/sales/is-cold-email-spam https://www.unsubcentral.com/2022/01/03/can-spam-2022/ https://www.ftc.gov/business-guidance/resources/can-spam-act-compliance-guide-business https://www.isipp.com/blog/do-i-have-to-put-my-real-physical-address-in-my-emails-to-be-can-spam-compliant-can-i-use-a-po-box/ https://www.unsubcentral.com/2022/01/03/can-spam-2022/