G Suite Config
From the Admin console Home page, go to Apps > G Suite > Gmail > Advanced settings. Tip: To see Advanced settings, scroll to the bottom of the Gmail page. In the Allow per-user outbound gateways section, select Allow users to send mail through an external SMTP server when configuring a "from" address hosted outside your email domains.
The reason you would want to allow per-user outbound gateways in G Suite is so that you can add another email address to your existing Gmail account. Add another email address to Gmail
Solving Gmail SMTP Functionality not enabled error
Your Google G-Suite or Google Workspace account does not allow per-user outbound gateways . According to Google, this setting would allow users to send mail through an external SMTP server when configuring a "from" address hosted outside your email domain.
Allow per-user outbound gateways On this page Why you would allow or disallow using an outbound gateway How do I allow or disallow use of an outbound gateway ? A per-user outbound gateway is a mail server, other than the Google Workspace mail servers, that delivers outgoing mail for a user in your domain.
How to Configure Google Workspace email to send out via TSS
Navigate to Apps > Google Workspace > Gmail > End User Access In the Allow per-user outbound gateways section, select Allow users to send mail through an external SMTP server
On the Setting for Gmail>> Scroll down to the bottom and click End User Access Click Allow per-user outbound gateways >> Allow users to send mail through an external SMTP server when configuring a "from" address hosted outside your email domains'. Tick this option and click Save Note: this change may take up to 24 hours to propagate to all ...
How to Use Domain Alias in Google Workspace for Gmail
Go to App >> Google Workspace >> Gmail >> Advanced Settings (direct link) Scroll down and look for " Allow per-user outbound gateways ." Tick the checkbox and save the configuration That should do the trick. Try adding an email address again, and it should work. That's all! Now you can send and receive an email from your alias domain.
ADMIN SETTINGS THAT MUST BE UPDATED IN PERSONAL GSUITE TO ALLOW SEND AS By default, users cannot use an outbound gateway . The G Suite mail servers deliver all outgoing mail, including mail that uses alternate From addresses. To allow users to use an ...
Create an Outbound Gateway in Google Workspace
Add an outbound gateway route Go to https://admin.google.com In the Admin console, go to Menu -> Apps -> Google Workspace -> Gmail -> Hosts. Click Add Route. For Name, enter a route name for the outbound gateway . For Enter host name or IP, enter the smarthost specific to your region. Select the options that you want to enable: Important: Uncheck "Perform MX lookup". Ensure the following boxes ...
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IP addresses —Set up your outbound gateway to accept and forward email only from Google Workspace email server IP addresses. Use these addresses to help prevent spammers from using your gateway as an open email relay. For more information, go to Google IP address ranges for outbound mail servers.