What an email signature is and why it matters

An email signature is a block of text that appears at the bottom of every email you send. It typically contains your name, job title, phone number, and sometimes a website or mailing address. Most email programs let you set one up once, and then it attaches automatically to every message you write.

A signature serves two practical purposes. First, it saves you from typing the same contact information over and over. Second, it signals to the person reading your email that you are a real person with a verifiable identity — not a scammer using a fake account. When you are trying to spot phishing emails or suspicious messages, a legitimate signature from the sender is one small piece of evidence that the email came from who it claims to come from.

You do not need a signature for personal emails to friends. But if you use email for work, to contact businesses, or to communicate with organizations that need to know how to reach you, a signature makes you look professional and trustworthy.

Key Takeaways

  • An email signature is a block of text that automatically appears at the bottom of every email you send, and you set it up once in your email settings.
  • A basic signature should include your full name and at least one way to contact you — usually a phone number or work email address.
  • Gmail, Outlook, Yahoo Mail, and Apple Mail all have built-in signature features that take less than five minutes to set up.
  • Keep your signature short and plain — no large images, bright colors, or fancy fonts, which can make emails harder to read and slower to send.
  • If you change jobs or phone numbers, update your signature in your email settings so new contacts have your current information.

How to create a signature in Gmail

Open Gmail in a web browser and click the gear icon in the top right corner. Select See all settings, then click the Forwarding and POP/IMAP tab. Scroll down until you see the Signature section.

Click Create new and give your signature a name — something like "Work" or "Personal" so you can tell them apart if you create more than one. In the text box below, type the information you want to appear at the bottom of your emails. A straightforward signature might look like this:

Jane Smith Marketing Manager 555-123-4567 jane.smith@company.com

When you are done typing, scroll down and click Save Changes. From now on, that signature will appear automatically at the bottom of every new email you write in Gmail. If you created multiple signatures, you can choose which one to use before you send each email.

How to create a signature in Outlook (web and desktop)

If you use Outlook on the web, click the gear icon in the top right and select View all Outlook settings. Go to Mail > Compose and reply. Scroll down to Email signature and type your signature in the text box.

If you use Outlook on your computer (Windows or Mac), open Outlook and go to File > Options (Windows) or Outlook > Preferences (Mac). Look for Mail or Signatures and click it. Click New, name your signature, type your information in the text box, and click Save.

In both versions, you can set a default signature so it appears on every email automatically, or you can choose which signature to use each time you write a message. Check the box that says Automatically include my signature on new messages I compose if you want it to appear without you having to do anything.

How to create a signature in Yahoo Mail and Apple Mail

In Yahoo Mail, click the gear icon and select Settings. Go to Mailboxes on the left, then click Signature. Type your signature in the text box and click Save. Your signature will appear on all new emails you send.

In Apple Mail on Mac, open the Mail app and go to Mail > Preferences. Click the Signatures tab. On the left, select the email account you want to add a signature to. Click the plus sign at the bottom, name your signature, and type your information in the text box on the right. Close the window when you are done — your signature will save automatically.

On iPhone or iPad, open Settings, scroll down and tap Mail, then tap Signature. You can create one signature for all accounts or a different signature for each account. Type your information and tap back to save it.

What to include and what to leave out

A professional signature should have your full name, your job title or role (if you have one), and at least one way to contact you. A phone number or work email address is standard. If you run a business or have a website, you can include a link to it. Keep the whole thing to four or five lines of text.

Do not include a large image, logo, or photo — these make emails slower to send and harder to read on phones. Do not use bright colors, unusual fonts, or lots of special characters. Many people read email on small screens, and a straightforward, plain signature is easier to read and looks more trustworthy than a decorated one.

If you work for a company, check whether your organization has rules about what signatures should contain. Some employers require you to include a legal disclaimer, a company logo, or specific contact information. If that is the case, follow those rules — your IT department can often provide a template you can copy and paste into your email settings.

When and how to update your signature

Update your signature whenever your contact information changes. If you get a new phone number, change jobs, or move to a different email address, go back into your email settings and edit the signature text. The change takes effect when ready on all new emails you send.

If you have an old email account you no longer use, you can delete its signature from your settings. If you use multiple email accounts for different purposes — one for work, one for personal use — you can create a different signature for each one. Most email programs let you set a default signature per account, so the right one appears automatically depending on which account you are sending from.

Keep in mind that your signature only appears on emails you send going forward. It does not change emails you sent in the past. If someone is looking at an old email thread, they will see the signature that was on that message when you sent it, not your current signature.

Frequently Asked Questions

Can I use different signatures for different types of emails?

Yes. In Gmail, Outlook, and most other email programs, you can create multiple signatures and choose which one to use before you send each email. Some people keep a formal signature for work emails and a casual one for personal messages. You can also set a default signature that appears automatically, then switch it if needed.

What if my email program does not have a signature feature?

Most major email providers (Gmail, Outlook, Yahoo, Apple Mail) have built-in signature tools. If you use a smaller or older email service, check the settings or help section for "signature" or "email signature". If it truly does not exist, you can type your contact information manually at the bottom of important emails, though this is slower and straightforward to forget.

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

Usually yes — your signature appears on new emails you write. When you reply to someone, most email programs add your signature below your reply text. When you forward an email, your signature typically appears at the bottom. You can delete it before sending if you do not want it on that particular message.

Is it safe to put my phone number in my email signature?

Yes, if the emails you send go to people you trust or organizations you work with. Your phone number is already semi-public if you use it for work or business. If you send emails only to close friends and family, you may not need a phone number in your signature. Think about who will see your emails and what information you are comfortable sharing with them.

Can I add a logo or image to my signature?

You can, but it is usually not a good idea. Images make email files larger, which slows down sending and receiving, especially on phones or slow internet connections. They can also fail to display properly depending on the recipient's email program. A text-only signature is faster, more reliable, and looks more professional in most business settings.