What an email signature is and why you might want one

An email signature is a block of text that appears at the bottom of every email you send. It usually contains your name, job title, phone number, and sometimes a company logo or website link. Outlook can add this automatically to each message, so you do not have to type it every time.

Think of it as the digital version of letterhead. Instead of printing your contact details on paper, your email does it for you. Some people use signatures only for work emails, while others add them to personal messages too. You control what goes in and whether it appears on replies, forwarded messages, or just new emails you start from scratch.

Key Takeaways

  • You create a signature in Outlook by going to File, then Options, then Mail, then Signatures — the path is the same whether you use Outlook on Windows or Mac.
  • You can create multiple signatures and choose which one to use for each email, or set a default signature that appears automatically.
  • A signature can include text, links, images, and formatting like bold or colored text, but keep it short so it does not take up more space than your actual message.
  • You can tell Outlook to add your signature only to new messages, or to replies and forwarded emails as well.

How to create a signature in Outlook on Windows

Open Outlook and click File in the top left corner. From the menu that opens, click Options. In the Outlook Options window, click Mail on the left side. Scroll down until you see Signatures and click that button.

In the Signatures window, click New. Outlook will ask you to name your signature — you can call it "Work" or "Personal" or anything else that makes sense to you. Type the name and click OK. Now you will see a text box where you can type your signature. Add your name, title, phone number, email, website, or anything else you want to appear at the bottom of your emails. You can use the formatting buttons above the text box to make text bold, change the color, or add a link.

When you are done typing, click OK at the bottom of the window. Your signature is now saved. The next time you write a new email, you can choose this signature from a dropdown menu, or you can set it as your default so it appears automatically.

How to create a signature in Outlook on Mac

Open Outlook and click Outlook in the top menu bar. Click Preferences. In the Preferences window, click Signatures. You will see a list of your email accounts on the left side.

Click the email account you want to add a signature to. Then click the + button at the bottom left to create a new signature. Type a name for it in the box that appears. In the large text box on the right, type your signature text. Use the formatting options in the toolbar to add bold, italics, links, or images. When you are done, close the Preferences window — your signature is automatically saved.

Setting a default signature so it appears automatically

If you want the same signature to appear on every new email without you having to choose it each time, you can set it as your default. Go back to the Signatures window (File > Options > Mail > Signatures on Windows, or Outlook > Preferences > Signatures on Mac). Look for a dropdown menu that says Choose default signature or Default signature.

Click the dropdown and select the signature you want to use. You can set different defaults for new messages versus replies and forwarded emails. For example, you might want your full signature on new emails but a shorter version on replies. Once you choose your defaults and click OK, Outlook will add the signature automatically from that point forward.

Adding images or links to your signature

You can make your signature more than just text. In the signature text box, you can paste an image — your company logo, for example — by clicking where you want it to go and then pasting from your clipboard. You can also add a link by typing the text you want to appear (like your website name), highlighting it, and clicking the link button in the toolbar.

Keep in mind that images and links can make your signature larger, which means it takes up more space in the email. Some people on slow internet connections or checking email on phones may find large signatures annoying. A good rule is to keep your signature to five or six lines of text, or one small image plus a couple of lines.

Changing or deleting a signature you have already created

If you want to edit a signature, go back to the Signatures window the same way you created it. Click the signature name in the list, and the text will appear in the box on the right. Make your changes and click OK. The next email you send will use the updated version.

To delete a signature, open the Signatures window, click the signature name in the list, and click the Delete button. Outlook will ask you to confirm. If that signature was set as your default, Outlook will stop adding it automatically, but any emails you already sent with it will not change.

Frequently Asked Questions

Can I have different signatures for different email accounts?

Yes. If you have multiple email accounts set up in Outlook, you can create a separate signature for each one. In the Signatures window, you will see your accounts listed on the left. Click each account and create or choose a signature for it. Outlook will use the right signature based on which account you are sending from.

What if I do not want a signature on every email?

Do not set a default signature. Instead, leave the default blank. When you write a new email, you can manually add a signature by clicking Insert > Signature (or the equivalent in your version of Outlook) and choosing which one to use. This way, you control when it appears.

Can I add a signature to emails I have already written but not sent?

If you have a draft email open and your default signature is not on it, you can add one manually. Click Insert in the toolbar, then Signature, and choose which one you want. If you want it to appear on all future drafts, set a default signature in the Signatures window.

Why does my signature look different when the person receives it?

This usually happens because of email formatting. If you write in plain text but your signature uses bold or colors, some email programs may strip the formatting out. Ask the person receiving your email what they see, and adjust your signature to use simpler formatting if needed.

Can I add a signature to replies without adding it to new emails?

Yes, but it depends on your version of Outlook. In the Signatures window, look for options that let you set different signatures for new messages, replies, and forwarded emails. Not all versions of Outlook have this feature, so check your Signatures window to see what options are available to you.