What a signature is and why you need one

A signature in Outlook is a block of text that appears automatically at the bottom of every email you send. It typically includes your name, job title, phone number, and company name — information you would otherwise type manually into every message. Once you set it up, Outlook adds it without you having to do anything.

The signature serves two purposes. First, it saves you time by eliminating repetitive typing. Second, it gives your emails a professional appearance and makes it straightforward for recipients to contact you through multiple channels. If you send emails for work, a signature is expected. If you send personal emails, a signature is optional but still useful.

Key Takeaways

  • Signatures are created in Outlook's settings, not in individual emails, and explore to all new messages you compose.
  • You can create multiple signatures and choose which one to use for each email, or set one as the default for all messages.
  • Signatures can include text, your contact information, and a company logo or image.
  • The steps differ slightly between Outlook on the web, Outlook for Windows, and Outlook for Mac, but the concept is identical.

Creating a signature in Outlook for Windows

Open Outlook and go to the File menu at the top left. Click Options at the bottom of the menu. In the Outlook Options window, select Mail from the left sidebar, then click Signatures in the right panel.

In the Signatures window, click the New button. A dialog box will ask you to name your signature — type something straightforward like "Work" or "Professional." Click OK. The text box below now shows where you can type your signature content. Type your name, title, phone number, email address, or any other information you want to appear at the bottom of your emails.

Once you have typed your signature, you can set it as your default. Under "Choose default signature," select your new signature from the dropdown menu next to "New messages." If you want the same signature to appear when you reply to or forward emails, select it from the dropdown next to "Replies and forwards" as well. Click OK to save.

Creating a signature in Outlook on the web

Log into Outlook on the web and click the gear icon in the top right corner. Select View all Outlook settings. In the settings menu, click Mail in the left sidebar, then select Compose and reply.

Scroll down to the Email signature section. Click in the text box and type your signature. You can format the text using the toolbar above the box — make text bold, change the font, add a link, or insert an image. When you are finished, click Save at the bottom of the page. Your signature will now appear automatically on all new emails you send from Outlook on the web.

Creating a signature in Outlook for Mac

Open Outlook and click Outlook in the menu bar at the top. Select Preferences. In the Preferences window, click Signatures. Click the plus sign at the bottom left to create a new signature and give it a name.

Type your signature content in the text box on the right. You can format it using the toolbar. When you are done, close the Preferences window — your changes save automatically. Your signature will appear on all new messages. If you created multiple signatures, you can choose which one to use by clicking the signature dropdown in the compose window before you send.

Adding images or logos to your signature

Most versions of Outlook allow you to insert an image into your signature. In Outlook for Windows, while editing your signature in the Signatures window, click the image icon in the toolbar. Select the image file from your computer. In Outlook on the web, click the image icon in the compose toolbar while editing your signature text box. On Mac, use the Insert menu while the signature box is active.

Keep images small — a logo should be no wider than 200 pixels. Large images make your emails slow to load and can trigger spam filters. If you add an image, test your signature by sending yourself an email to make sure it displays correctly on different devices and email clients.

Managing multiple signatures

You can create as many signatures as you need. Some people keep one for work emails, one for personal emails, and one for specific projects or departments. After you create multiple signatures, you can choose which one to use each time you compose an email.

In Outlook for Windows, open a new email and look for the signature dropdown in the Insert tab at the top. In Outlook on the web, the signature dropdown appears at the bottom of the compose window. On Mac, the dropdown is in the compose window toolbar. Select the signature you want before you send. You can also set one signature as your default so it appears automatically, and manually switch to a different one when needed.

Troubleshooting signatures that do not appear

If your signature is not showing up on your emails, first check that you set it as the default. Go back to the Signatures settings and confirm that a signature is selected in the "New messages" dropdown. If the dropdown is empty, create a new signature or select an existing one.

If you are replying to an email and your signature does not appear, check the "Replies and forwards" setting. Some people intentionally leave this blank so signatures do not clutter reply chains. If you want your signature on replies, select it from that dropdown. In Outlook on the web, signatures may not appear in the compose window until you click outside the text box — this is normal and the signature will be included when you send.

Frequently Asked Questions

Can I use different signatures for different email accounts?

Yes. If you have multiple email accounts set up in Outlook, you can create separate signatures for each one. In Outlook for Windows, the Signatures window shows a dropdown at the top labeled "E-mail account." Select each account and create a signature for it. In Outlook on the web, signatures are tied to your account, so each account has its own signature settings.

How do I edit a signature after I create it?

Go back to the Signatures settings using the same path you used to create it. Click the signature name in the list and edit the text in the box. Your changes save automatically when you click OK or close the settings window. The next email you send will use the updated signature.

Can I include a hyperlink in my signature?

Yes. In Outlook for Windows, highlight the text you want to link, click the hyperlink icon in the toolbar, and paste the URL. In Outlook on the web and Mac, use the Insert menu or the link icon in the toolbar. Test the link by sending yourself an email to confirm it works.

What happens to my signature if I delete it?

Once you delete a signature, it is gone permanently. If you had set it as your default, Outlook will stop adding any signature to new emails until you create a new one or select a different default. You cannot recover a deleted signature, so make sure you want to remove it before you do.

Can recipients see my signature formatting if they use a different email client?

Most formatting carries over, but some email clients display text differently. Bold, italics, and colors usually work. Fonts may change if the recipient's email client does not support the font you chose. Images always display, but some clients may block them by default. Test your signature by sending emails to people who use different email services to see how it looks on their end.