Gmail

Setting Up Send-As Aliases in Gmail for Workspace

Quick Answer

To send as an alias in Gmail, add it under Settings > Accounts > Send mail as, verify it, and make sure the alias is also set up as a Workspace user alias in the Admin console so authentication (SPF/DKIM) still passes.

A "send as" address in Gmail is a display-level setting. For mail sent from it to authenticate properly and avoid delivery issues, the alias generally needs to exist at the Workspace admin level too, not just inside one user's Gmail settings.

Common Causes

An alias added only in personal Gmail settings, without a matching Workspace-level alias.
Send-as mail failing SPF/DKIM checks because the sending path does not match what DNS expects.
Confusion between a personal "send as" alias and a shared departmental alias used by multiple people.

Safe Troubleshooting Steps

In the Admin console, add the address as a user alias if it is not already one.
In Gmail, go to Settings > Accounts > Send mail as, and add the address.
Complete Gmail's verification step for the new send-as address.
Send a test message and check the headers to confirm SPF/DKIM still pass.

What to Verify

The alias exists at the Workspace admin level, not just in one user's Gmail settings.
A test message sent from the alias passes SPF and DKIM.

When Professional Help May Be Useful

If test messages sent from the alias are failing authentication, that usually points to a DNS or Workspace-alias mismatch worth reviewing directly.