Adding extra but non-aliased emails within GSuite

Question

Have setup GSuite to handle emails for a certain domain name and have also added aliases via: Google Admin -> Users -> {User} -> User Information -> Email Aliases

However, what if I want to add an email address so that it exists, but discard or don't receive the email from it?

Use case is I need to setup a [email protected] email address but obviously don't want to add it as an alias.

Reason being is I have noticed sometimes in the past that some mail servers will reject mail if the email it's coming from doesn't actually exist.

Answer 1

GSuite support was surprisingly helpful and prompt after emailing them.

Note: Please read the important extra details at the bottom of my answer.

You can achieve that in two ways, depending on what you prefer.

First option: (Create a new user and a new organizational unit and set up a routing rule that rejects all incoming messages for that organization):

• Create a new user (in this case “[email protected]”) > Create a new organizational unit (https://support.google.com/a/answer/182537?hl=en) > Move the new user to the new organizational unit (https://support.google.com/a/answer/182449?hl=en).
• After that, go to Apps>G Suite>Gmail>Advanced settings.
• On the left, select the new organization.
• Scroll to the Routing setting in the Routing section, hover over the setting, and click Configure.
• Make sure to enter a description for the rule at the top
• Under "Messages to affect" select Inbound and Internal receiving
• Under “For the above types of messages, do the following”, select “Reject message”
• Optional: Add a rejection message
• Click Save
• Click Save again in the bottom right of the screen.

Fore more information on routing, please visit https://support.google.com/a/answer/6297084?hl=en

Second option: (Create an email alias and set up a filter that automatically delete every incoming email to that alias)

• Create an email alias for one of the user (https://support.google.com/a/answer/33327?hl=en)
• Create a filter with search criteria as follow: To: email alias address -Click on “Create filter” and tick “Skip the Inbox”, “Mark as read”, “Delete it”

For more information about filters, please visit https://support.google.com/mail/answer/6579?hl=en.

If you can create a new user, I would recommend the first option, because the inbound messages will never reach the inbox and the sender will get a rejection message.

Some points of note:

For Option 1 you will incur extra monthly fees for adding an extra user unless you have available ones under your current plan.

Additionally, at least for my situation, I have decided it best that Option 2 would probably be the better option as with Option 1 it seems to act the same as if the mailbox doesn't exist, which is exactly the problem I am trying to avoid.

So to summarise:

• Option 1 may incur extra fees and will act as if the mailbox doesn't exist as the user will be returned a rejection message.
• Option 2 will not cost any extra and will "fail" silently.