Using Google Oauth in HostBill for sending emails
Create Google Application
To create Google Application go to the Google Cloud Console. In the Navigation menu, select APIs & Services.
From the Menu, select Library and then search for Gmail API and enable API.
Then select My Application and create a new project. Set the Project Name and Location.
In the side menu select OAuth consent screen, select User Type and click on Create button.
In App information, set App name and User support email. For Developer contact information set Email address.
Add the following Scopes:
./auth/userinfo.email
./auth/userinfo.profile
openid
In the menu, select Credentials, then Create Credentials and OAuth client ID.
Enter Name and then set Application type to Web application. In Authorized redirect URLs add Redirect URL from HostBill (Settings → Mail)
Set up Gmail in HostBill
After creating Credentials, Client ID and Client Secret will be returned. These values must be set in HostBill in Mail Settings or in Additional mail senders.
Set:
SMTP Email address
SMTP Hostname
Port
Authentication to OAuth2
Provider to Google
Then save the changes and press Connect. After successful Authorization, the Connection Token should be set.
SMTP Hostname should contain ssl:// or tls://