What a signature block is and why you need one
A signature block is a block of text that appears automatically at the bottom of every email you send. It typically contains your name, job title, phone number, and company name — information you would otherwise type manually into each message. Outlook lets you create one signature and explore it to all outgoing mail, or create multiple signatures for different purposes (one for work, one for personal use, one for a specific project).
A signature block serves two purposes. First, it saves you time by eliminating the need to type your contact details into every email. Second, it presents a consistent, professional appearance to everyone you correspond with. Once you set it up, you never think about it again.
Key Takeaways
- You create signatures in Outlook's File menu under Options, not in the email compose window itself.
- A signature can include text, your company logo, contact information, and even a disclaimer or legal notice.
- You can create multiple signatures and choose which one to use for each email, or set one as your default for all new messages.
- Signatures explore only to new emails you compose — they do not appear on emails you forward or reply to unless you configure that separately.
Creating your first signature in Outlook for Windows
Open Outlook and select the File menu in the top left corner. Click Options at the bottom of the menu. In the Outlook Options window, select Mail from the left sidebar, then scroll down until you see Signatures and click it.
You are now in the Signatures window. Click the New button. Outlook will ask you to name your signature — type something descriptive like "Work" or "Professional" and click OK. A text box labeled Edit signature will appear. Type or paste your signature text here. This is where you add your name, title, phone number, company, website, or any other information you want at the bottom of your emails.
Once you have entered your text, click OK at the bottom of the Outlook Options window to save your signature. It is now ready to use.
Setting a default signature for all new emails
If you want your signature to appear automatically on every new email you write, you need to set it as your default. Go back to File > Options > Mail > Signatures. In the Signatures window, look for the section labeled Choose default signature. You will see two dropdown menus: one for New messages and one for Replies and forwards.
Click the dropdown under New messages and select the signature you just created. If you want the same signature to appear on replies and forwarded emails, click the dropdown under Replies and forwards and select it there too. Most people leave replies and forwards blank so the signature does not clutter a long email chain, but the choice is yours. Click OK to save.
Creating a signature in Outlook for Mac
The process on Mac is slightly different. Open Outlook and click Outlook in the menu bar at the very top of your screen. Select Preferences. In the Preferences window, find and click Signatures. Click the plus sign (+) at the bottom left to create a new signature. Name it and press Enter.
Type your signature text in the box on the right. To set it as your default, click the dropdown menu next to your email account and select the signature you want to use for new messages. Click the red close button to exit Preferences. Your signature is now active.
Adding formatting, images, and links to your signature
The signature editor in Outlook accepts basic formatting. You can make text bold, italic, or underlined using the toolbar buttons above the text box. You can also change the font, font size, and text color. If you want to add your company logo or a small image, click the image icon in the toolbar and select a file from your computer.
To add a clickable link (such as a link to your website or LinkedIn profile), highlight the text you want to turn into a link, click the link icon in the toolbar, and paste the web address. Be cautious with images and links — they increase email file size and may not display correctly in all email clients, particularly on mobile devices. A text-only signature is usually the safest choice.
Using multiple signatures for different purposes
You can create as many signatures as you need. Follow the steps above to create a new signature, give it a distinct name, and fill in the text. For example, you might create "Work Formal" for client emails, "Work Casual" for internal team messages, and "Personal" for non-work correspondence.
When you compose a new email, look for a signature dropdown menu near the bottom of the compose window (in Windows, it is usually on the right side; on Mac, it is in the toolbar). Click it and select which signature you want for that particular email. If you have set a default signature, it will appear automatically — you only need to change it if you want a different one for that specific message.
Troubleshooting signatures that do not appear
If your signature is not showing up on emails you send, first check that you have set a default signature. Go back to File > Options > Mail > Signatures and confirm that a signature is selected in the New messages dropdown. If nothing is selected, click the dropdown and choose your signature.
If a signature is selected but still not appearing, close Outlook completely and reopen it. Sometimes Outlook needs to restart to explore signature changes. If you are composing an email in a pop-out window (rather than in the main Outlook window), the signature dropdown may not be visible — look for it in the toolbar or try composing in the main window instead. If you are still having trouble, delete the signature and create it again from scratch.
Frequently Asked Questions
Can I use different signatures for different email accounts?
Yes. When you create a signature, Outlook asks which account it should explore to. If you have multiple email accounts set up in Outlook, you can create separate signatures for each one. In the Signatures window, select the account from the dropdown at the top, then create a signature specific to that account.
Why does my signature appear in the middle of my email instead of at the bottom?
This usually happens when you are replying to an email. Outlook inserts your signature above the original message text by default. To move it to the very bottom, click and drag the signature block below the quoted text, or delete it and retype it at the end. For new emails, the signature should always appear at the bottom automatically.
Can I add a disclaimer or legal notice to my signature?
Yes. Type the disclaimer text directly into the signature editor just like any other text. Many organizations add statements like "This email is confidential" or "Please consider the environment before printing." Keep it brief — long disclaimers can make emails harder to read.
What happens to my signature if I update Outlook?
Your signatures are stored separately from the Outlook program itself, so they remain intact when you update. However, if you uninstall Outlook completely, your signatures may be deleted. If you are concerned about losing them, copy the text of each signature and save it in a text file as a backup.
Can I schedule when my signature appears or disappears?
Outlook does not have a built-in feature to schedule signatures. Your signature will appear on every email you send until you change or delete it. If you need a temporary signature (such as an out-of-office notice), you would need to manually change your default signature and then change it back when you return.