Connection could not be established with host smtp.gmail.com :stream_socket_client(): unable to connect to ssl://smtp.gmail.com:465

Hello!
Help to understand with the order of connection of mail in the corporate domain. I use and plan Google's Developer Console
What is now.

1. Google Workspace or before G-Suite https://admin.google.com/ +1-9 E-mail
2. new project with OAuth 2.0 credentials in with Create credentials to access your enabled APIs OAuth 2.0 Client IDs

Next, I move to admin.php?options/groups/emailOptions/ связываю пользователя и у меня подключается:
Code:

Email transport method...

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