How to Set a Different Signature for Each Gmail Alias

Adding a different Gmail signature for each alias is not automatic — and that gap trips up almost everyone who runs multiple send-as addresses from one account. Gmail lets you create as many named signatures as you want and as many verified aliases as you need, but it never links the two. Until you configure the defaults yourself, every alias you send from pulls whichever signature happens to be active at compose time, which is usually the one tied to your primary address.

That breaks things for consultants sending from separate brand addresses, freelancers switching between personal and client identities, and agency operators managing several sender addresses inside one inbox. The fix is a three-part configuration: create a signature, then assign it to an alias as the new-mail default, then assign it again as the reply default. This guide covers each step in order, explains where free Gmail and Google Workspace differ, and lists the most common reasons the signature still fails to apply after you have configured it.

What you need before you start#

Two things must be in place before signature defaults will work. First, each address you want to send from must be added as a verified send-as address. Go to Settings > See all settings > Accounts and Import > Send mail as. Gmail sends a confirmation code to the alias address, and you must enter that code before the alias appears anywhere in the signature settings. An unverified alias simply does not show up in the defaults dropdowns.

Second, each signature must have a name. If you have only used the default unnamed signature block, Gmail may not surface it in the alias-assignment controls. Click 'Create new' in the Signature section and give each one a clear label — for example, 'Consulting — Acme' or 'Personal — Jane Smith' — so you can match each signature to the right alias without guessing.

How to set a different signature for each Gmail alias#

All of this lives in Gmail's General tab. The steps below apply to both free Gmail and Google Workspace accounts. Follow them in order — the per-alias defaults section only appears once you have at least one named signature and at least one verified send-as address.

1. 1

   Open Settings

   Click the gear icon in the top-right corner of Gmail and choose 'See all settings'. This opens the full Settings panel. The quick-settings sidebar that appears first does not include signature controls.

2. 2

   Go to the General tab

   The General tab is selected by default. Scroll past language, conversation view, and reading pane settings until you reach the Signature section. It sits roughly halfway down the page.

3. 3

   Create a named signature for each alias

   Click 'Create new'. Give the signature a name that matches its alias — for example, 'Consulting Brand' or 'Support Address'. Type or paste the signature content in the editor. Repeat this step until you have one named signature for each send-as address you want to configure.

4. 4

   Set 'For new emails' to the matching alias

   Below each signature's editor there is a 'Signature defaults' subsection. The first dropdown, 'For new emails use', lists every verified send-as address in your account. Open it and select the alias this signature belongs to. After this, composing a new email from that alias will automatically insert this signature.

5. 5

   Set 'On reply/forward' to the same alias

   The 'On reply/forward use' dropdown is a separate control on the same signature, and it must be set independently. Gmail treats replies and new messages as different compose events, each with its own default. If you skip this step, your replies from the alias will pull a different signature — usually the one assigned to your primary address. Set both dropdowns to the same alias.

6. 6

   Repeat for every other alias

   Each signature's defaults apply only to the single address you selected. Go through every signature you created and assign both dropdowns to its corresponding alias address. If you have three aliases, you configure three pairs of defaults across three signatures.

7. 7

   Save and verify

   Scroll to the bottom of Settings and click 'Save Changes'. Open a compose window, switch the From: field to each alias in turn, and confirm that the correct signature loads automatically. Then open a reply in a thread sent to that alias and confirm the reply signature is also correct.

How signature defaults differ between free Gmail and Google Workspace#

The steps above apply identically to both account types. The differences below matter mainly for team environments or when you are troubleshooting an alias that should work but does not.

The most consequential Workspace difference is admin-controlled signatures. If your organization enforces a signature through the Admin console, your personal per-alias setting may be appended below it or replaced entirely. If a signature keeps appearing that you did not set, or your configured signature is not showing, ask your Workspace administrator whether a domain-wide signature policy is active before continuing to troubleshoot the settings yourself.

Why the alias signature is not applying — and how to fix it#

If you followed the steps above and the correct signature still does not appear, one of these causes is usually responsible.

A faster way to manage signatures across aliases#

The manual steps above fix the signature block for each alias, and they work. But running multiple aliases from one Gmail account usually means more than a different sign-off is needed — different clients, different tones, different context about what each relationship involves. Keeping all of that consistent on every email, across every alias, is ongoing work that goes well beyond the Settings panel.

We build AI Emaily, an AI-native email client that connects Gmail and your other accounts in one place. Alongside per-alias signatures, AI Emaily lets you set a client profile for each alias or contact — who they are, how formally you write to them, what context matters. When you compose from an alias, the assistant drafts with that context built in, not just the right footer. Human approval is required before anything sends. If you manage three or more aliases with meaningfully different audiences, the 7-day free trial starts at aiemaily.com.