Mail app does not send to wife's gmail account.
I use a gmail account to send emails using Apple's Mail app. It works for everyone except my wife who uses her google account. The messages do not go to her spam box, and I never receive an error message. Mail shows the messages as sent. She can only receive emails from me if I use my comcast account. I can also send her email from google's gmail page. We have checked and both of us have each other listed on their gmail contacts list. Neither is blocked. Why does Apple Mail fail to send her (and no one else) messages from my gmail account?
MacBook Air 15″, macOS 26.1