How to Change Email Signature in Outlook

This guide walks you through creating, editing, and switching email signatures in Outlook for Windows, Mac, and the web version. You’ll learn where the signature settings live, how to format text and add images or links, and how to fix common issues like signatures not appearing or showing stale information.

What You’ll Need

• Access to Outlook (desktop app or web version) with an email account already configured.
• Your signature content: name, title, phone number, website, etc.
• Optional: a logo or image file (PNG or JPG) if you want to include it.

Step-by-Step

1. Open Outlook and go to Settings. In Outlook for Windows, click File > Options > Mail > Signatures…. In Outlook for Mac, click Outlook menu > Preferences > Signatures. In Outlook on the web, click the gear icon (Settings) at the top right, then search for “signature” or navigate to Mail > Compose and reply.
2. Create a new signature or select an existing one. In the signature editor window, you’ll see a list of existing signatures. Click New (or the “+” button) to create a fresh one. Give it a name like “Work” or “Personal” so you can tell them apart.
3. Type your signature text. In the editing pane, enter your name, job title, company, phone number, email, and any other details. Use the formatting toolbar to bold, italicize, change font, size, and color. Keep it professional and concise—most signatures are 3–6 lines.
4. Add an image or logo (optional). In the signature editor, click the image icon (usually a small picture of a mountain) or right-click and choose Picture. Select your file and adjust the size by dragging the corners. Avoid huge images—keep the width under 300 pixels to prevent emails from being flagged as spam.
5. Insert a hyperlink (optional). Highlight text like “Visit our website” and click the link icon (chain link). Enter the URL (e.g., https://example.com) and click OK. You can also link your email address or LinkedIn profile.
6. Choose which account(s) to use this signature for. In the same window, you’ll see drop-down menus for “E-mail account” (if you have multiple accounts) and “New messages” / “Replies/Forwards.” Select the signature you just created for each. You can use different signatures for new emails vs. replies—many people use a shorter one for replies.
7. Apply and save. Click OK (Windows) or Save (Mac/web). Your signature is now active. To test it, compose a new email—it should appear automatically.
8. Update an existing signature. To change text, images, or links, go back to the signature editor, select the signature from the list, make your edits, and save. The changes apply to all future emails; old sent emails remain unchanged.

Common Mistakes

• Forgetting to assign the signature to an account. Creating a signature doesn’t automatically attach it to your email account. You must select it in the “New messages” and “Replies/Forwards” dropdowns.
• Using a signature with too many images or large files. This can cause emails to go to spam or be blocked. Keep images small and use text links instead of embedding large logos.
• Including sensitive personal info. Avoid home addresses, personal phone numbers, or birth dates in a professional signature.
• Overcomplicating the format. Fancy fonts and bright colors may not render on all devices. Stick to standard fonts like Arial or Calibri and use one or two colors.
• Editing the wrong signature. If you have multiple signatures (e.g., “Work” and “Personal”), make sure you’re editing the one you actually use. Check the dropdowns before saving.

Tips

• Keep it under 4 lines. A short signature is easier to read and looks more professional.
• Use a standard font size (10–12 pt). Larger fonts can make your email look unprofessional.
• Include only essential contact methods. Email and phone are usually enough. Add LinkedIn or website only if relevant.
• Use a signature for replies that is shorter. Many people just use their name and phone number on replies to keep the thread clean.
• Test on mobile. Send a test email to yourself and view it on your phone. If the formatting breaks, simplify.
• Use the same signature across devices. Outlook desktop and web are separate—you’ll need to set up the signature in each place you use.

Troubleshooting

Signature not appearing in new emails: Go back to the signature settings and confirm you’ve selected the signature for “New messages.” If you’re using Outlook on the web, try refreshing the browser. In the desktop app, restart Outlook.

Signature appears but is blank or missing image: This often happens when the image file is moved or deleted. Re-insert the image from the original location. Also check that the image isn’t too large—Outlook may block it.

Signature shows old text after editing: Make sure you clicked Save after editing. In Outlook for Windows, the OK button saves. If you’re using multiple accounts, ensure you edited the correct signature and that it’s still assigned to the right account.

Signature is there but formatting looks wrong (e.g., font changes): This can happen when the recipient’s email client doesn’t support your font. Use a web-safe font like Arial or Times New Roman. Also avoid using HTML tables—stick to simple paragraphs.

Signature not working on replies/forwards: Check the “Replies/Forwards” dropdown in the signature settings. It might be set to “(none).” Select the desired signature there.

Can’t find the signature option in Outlook on the web: The option is under Settings (gear icon) > Mail > Compose and reply. If you don’t see it, try switching to the full version of Outlook on the web (not the light version).

Frequently Asked Questions

Q: Can I use different signatures for different email accounts in Outlook?
A: Yes. In the signature editor, you can create multiple signatures and assign each to a different account using the “E-mail account” dropdown.

Q: How do I add a logo to my Outlook signature?
A: In the signature editor, click the image icon and select your logo file. Resize it to be small (e.g., 100–200 pixels wide) and place it above or beside your text.

Q: Why is my signature not showing up on my iPhone?
A: Outlook for iOS has its own signature settings. Open the Outlook app, go to Settings (gear icon) > Signature, and set it there. The desktop signature doesn’t sync to mobile.

Q: Can I make my signature clickable (e.g., a link to my website)?
A: Yes. Highlight the text you want to link, click the link icon, and enter the URL. Outlook will make it a clickable hyperlink.

Q: How do I remove a signature entirely?
A: Go to signature settings, select the signature, and click Delete (or the minus icon). Then set “New messages” and “Replies/Forwards” to “(none)” to stop it from appearing.

Q: Will my signature be added to emails I send from my phone?
A: Only if you set it up in the Outlook mobile app. Desktop and web signatures are separate.

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