What an email signature is and why you might use one

An email signature is a block of text that appears at the bottom of every email you send. It typically includes your name, phone number, job title, or a short message — anything you want readers to see without typing it each time. Most email providers let you create one signature that goes on all your messages, or multiple signatures for different purposes.

A signature saves you from typing the same contact details repeatedly. It also gives your emails a more polished look, especially if you use email for work. Some people use signatures to include a disclaimer, a link to their website, or a professional tagline.

Key Takeaways

  • Email signatures appear automatically at the bottom of every message you send once you set them up in your account settings.
  • Most email providers let you create multiple signatures and choose which one to use for each message, or set a default for all mail.
  • You can include text, links, and sometimes images or formatting, but keep signatures short — most people scan them in a second.
  • Changes to your signature take effect on new messages only; old emails you already sent will not change.

How to add a signature in Gmail

Open Gmail and click the gear icon in the top right corner, then select See all settings. Scroll down to the Signature section. Click Create new if you want multiple signatures, or click in the text box to edit your default signature.

Type or paste your signature text. You can use the formatting toolbar to make text bold, italic, or colored, and to add links. When you are done, scroll to the bottom of the page and click Save Changes. Your signature will now appear on all new emails you compose. If you created multiple signatures, you can choose which one to use each time you write a message — look for the signature dropdown menu in the compose window.

How to add a signature in Outlook

Open Outlook and click File in the top left. Select Options, then Mail, then Signatures. Click New to create a signature and give it a name. Type your signature text in the editing box below.

You can format the text using the toolbar — bold, italic, font size, and color are all available. When you finish, click OK. Back in the Signatures window, you can set a default signature for new messages and a separate one for replies. Click OK again to save. Your signature will appear automatically on new emails from now on.

How to add a signature in Apple Mail

Open Apple Mail and click Mail in the menu bar at the top. Select Preferences (or Settings on newer versions). Click the Signatures tab. On the left side, select the email account you want to add a signature to.

Click the + button at the bottom to create a new signature, or double-click an existing one to edit it. Type your signature text in the box on the right. You can make text bold or italic using the formatting menu. When you are done, close the Preferences window. Your signature will appear on all new messages sent from that account.

What to include and what to avoid

Keep your signature short — two to four lines is standard. Include your name, a phone number if you are comfortable sharing it, and a job title or role if relevant. A link to your website or social media profile works well if it is professional. A single line of text, like a favorite quote or a company tagline, is fine too.

Avoid large images, animated graphics, or anything that makes your email file size much bigger — some people still have slow internet or limited email storage. Do not include sensitive information like your home address or social security number. If you use email for both work and personal messages, consider creating two signatures and switching between them as needed.

Signature formatting and special characters

Most email providers let you use basic formatting: bold, italic, underline, and colored text. You can also add hyperlinks — highlight the text you want to link, click the link button in the toolbar, and paste the web address. Some providers let you insert a small image, though this is less common and can slow down email delivery.

Special characters like dashes, bullets, or symbols usually work fine. If you copy and paste a signature from another program, check that it looks right in your email — sometimes formatting gets lost or looks different depending on what device the reader uses. Test your signature by sending yourself an email and opening it on your phone to see how it appears.

Changing or removing your signature later

You can edit your signature at any time by going back to the same settings menu where you created it. In Gmail, go to Settings > Signature. In Outlook, go to File > Options > Mail > Signatures. In Apple Mail, go to Mail > Preferences > Signatures. Make your changes and save.

If you want to remove your signature, delete all the text in the signature box and save. Your old emails will keep their signatures — only new messages you send will have no signature. If you created multiple signatures and want to delete one, select it in the list and click the delete or remove button.

Frequently Asked Questions

Can I use a different signature for different email accounts?

Yes. If you have multiple email accounts in the same provider, most let you set a different signature for each one. In Gmail, create separate signatures and choose which one to use when composing. In Outlook and Apple Mail, you can assign a default signature to each account separately.

Will my signature appear on emails I forward or reply to?

Usually yes, but it depends on your settings. In Gmail, your signature appears on new messages and replies by default. In Outlook, you can choose whether to include your signature on replies. Check your settings if you do not want a signature on every single message.

What if my signature looks different on someone else's phone?

Email formatting can look different depending on the device and email app someone uses. Stick to straightforward formatting — bold text and basic colors work on almost everything. Avoid fancy fonts or large images, which may not display the same way for everyone reading your email.

Can I add an image or logo to my signature?

Most email providers support images in signatures, though the process varies. Gmail and Outlook both let you insert an image from your computer or the web. Keep images small and under 50 KB so emails do not become too large. Test how it looks on mobile before sending important messages.

Do I need to add my signature to every email manually?

No. Once you set up a signature in your account settings, it appears automatically on all new emails you compose. You do not need to type it or add it each time — the email provider handles it for you.