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Allow Per User Outbound Gateways

Allow per user outbound gateways essentially allows another account to send on behalf of your email address. Basically enabling what majority called as “Send As”. In enabling this you allow users to send mail through an external SMTP server when configuring a “from” address hosted outside your email domains.

Enabling Allow Per User Outbound Gateways will fix:

    1. Send Mail As setup error
      • Using an outbound gateway can also prevent the appearance of “on behalf of” addresses in the From field. When a user sends a message from an alternate From address through the G Suite mail servers, some recipient mail applications display the name of the sender as “ on behalf of”.
      • “You must send through SMTP servers when you send as [email] @ However, this functionality is not available for your account. Please contact your domain administrator for more information.”  Error Message

  1. POP Email connection setup
    • Since a POP stops the connection between your client and server it is considered now as Another SMTP relaying to Google SMTP Servers. That’s the reason why you need to enable the Allow Per User User Outbound Gateways.

Why does the Allow Per User Outbound Gateways is disabled by Default

Messages delivered using an outbound gateway do not flow through any outbound gateway specified for your domain. If you need to ensure that all outgoing mail from your users passes through the outbound gateway, disable users’ option to specify an outbound gateway.

Steps in Activating Allow Per User Outbound Gateways

Now let’s begin activating the Allow Per User Outbound Gateways:

  1. Log in to the Admin Console  
    Google Apps G Suite Advance Settings
  3. Scroll down and look for “Allow users to send mail through an external SMTP server when configuring a “from” address hosted outside your email domains.”Allow per user Outbound Gateway settings
  4. Check the Settings and make sure to SAVE.


By default, the G Suite mail servers deliver the user’s outgoing messages regardless of which email address he or she chooses to send from. However, the user might want the mail server for to deliver any message that uses the address In this situation, the user wants to use the mail server as an outbound gateway. Once this option is enabled, users can configure their alternate email addresses to use an outbound gateway. Each user must configure this option individually.

I hope that this give you more information on how Allow per user Outbound Gateways can help your email configurations. Always remember to take full control of your account by utilizing also the Reports function in G Suite for any unauthorized changes happening. That would be it guys! Feel free to leave a comment below if you still need help or clarifications.


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