How to Add an Email Signature in Outlook

Microsoft currently ships two different Outlook apps side by side, and they set up signatures differently - pick the section that matches what you're running.

Updated August 2026

Classic Outlook

  1. Build your signature with the Mail Ink editor, save it, and click Copy to clipboard on the install screen.
  2. Open Outlook and compose a new email.
  3. Go to the Message tab, click Signature > Signatures.
  4. Click New, then give it a name.
  5. Click the + icon to add a new signature.
  6. Paste your signature into the text area (Ctrl+V or Cmd+V).
  7. Windows: right-click the signature and choose Keep Source Formatting. Mac: choose Keep Source Formatting from the pop-up menu.
  8. Save changes. Done!

New Outlook

  1. Build your signature with the Mail Ink editor, save it, and click Copy to clipboard on the install screen.
  2. Go to outlook.live.com.
  3. On the View tab, select View settings.
  4. Go to Accounts > Signatures.
  5. Click + New signature and give it a name.
  6. Paste your signature into the text area beneath the name field.
  7. Optional: set it as your default signature for new messages and replies.
  8. Click Save. All done!

On the Outlook mobile app

  1. Open the Outlook app and tap your profile picture (or the menu icon) in the top left.
  2. Tap the gear icon to open Settings.
  3. Tap the email account you want to add a signature to.
  4. Tap Signature and turn on Use email signature if it's off.
  5. Type your signature into the text box - it saves automatically.

Note: Like most mobile mail apps, the Outlook app's signature field is plain text only. For a fully-styled signature with logos and fonts, set it up in desktop Outlook instead.

Frequently asked questions

They're separate apps with separate signature settings - a signature saved in Classic Outlook doesn't carry over to New Outlook (or Outlook.com) and vice versa. Set it up in whichever version you actually send mail from.

Yes. In Classic Outlook, assign a default signature per account under "Choose default signature." In New Outlook, pick the account first at the top of Accounts > Signatures before creating the signature.

Outlook sometimes defaults to "Keep Text Only" on paste. Right-click the pasted content and choose "Keep Source Formatting" (Windows), or use the formatting pop-up menu that appears after pasting (Mac).

Only if you set it. The signature settings have separate dropdowns for new messages and for replies/forwards - point both at your signature if you want it everywhere.

The Outlook app for Android and iOS keeps its own signature setting, separate from desktop - see the mobile app steps above to add it there too.

Setting up another email client?

Gmail
Apple Mail
Thunderbird
iPhone & iPad

Don't have a signature yet?

Build one free in the Mail Ink editor, then come back and follow the steps above.

Create your free signature