Where to find the signature setting in your email
Most email services let you add a signature through their settings menu. In Gmail, open Settings (the gear icon in the top right), click the "Forwarding and POP/IMAP" tab, scroll down to "Signature", and click "Create new". Type or paste your signature text, then click "Save Changes" at the bottom. In Outlook on the web, go to Settings (the gear icon), select "Mail" > "Compose and reply", scroll to "Email signature", type your signature, and click "Save".
If you use Apple Mail on a Mac, open Mail > Settings, click "Signatures", select the email account on the left, click the plus sign to create a new signature, type your text, and close the window — it saves automatically. On iPhone or iPad, go to Settings > Mail > Signature, choose "Per Account" or "All Accounts", and type your signature text.
For Outlook on Windows, open File > Options > Mail > Signatures, click "New", name your signature, type the text, click "OK", then choose which account uses it by default. Yahoo Mail users should go to Settings > Composing and addressing > Signature and type or paste the text there.
Key Takeaways
- Every major email service has a signature setting in its main settings or preferences menu, and you can usually create multiple signatures for different purposes.
- Your signature appears automatically at the bottom of every new email you send, but usually not on replies unless you turn that option on.
- You can include text, line breaks, and links in most email signatures, but images and special formatting may not work the same way across all email clients.
- If you use multiple email accounts, you can set a different signature for each one or use the same signature across all accounts.
What you can and cannot put in a signature
Plain text works everywhere — your name, title, phone number, website URL, and a few lines of contact information will display the same way for everyone who receives your email. Most email services also support basic formatting like bold, italic, and different font sizes, though the recipient's email client may display these differently.
Links work in most email signatures. You can paste a URL directly (like www.example.com) or use the link tool in your email service to make clickable text. However, images embedded in signatures can cause problems: some email clients block images by default, some mobile devices display them poorly, and large images can make your email file size bigger. If you want to include a logo or photo, test it first by sending yourself an email and opening it on your phone and desktop.
Special characters, colored text, and custom fonts may not display correctly for everyone. Stick to standard fonts like Arial, Calibri, or Times New Roman if you want your signature to look the same on every device. Avoid all-caps text and excessive punctuation, which can look unprofessional and may trigger spam filters.
Setting your signature to appear on replies and forwarded emails
By default, most email services add your signature only to new emails you write, not to replies or forwarded messages. In Gmail, this is the standard behavior and there is no setting to change it — your signature appears only on new messages. In Outlook on the web, go to Settings > Mail > Compose and reply, find "Email signature", and check the box next to "Automatically include my signature on messages I send" to add it to replies as well.
On Outlook for Windows, open File > Options > Mail > Signatures, select your signature, and check "Include signature on replies and forwards" if you want it on every message type. Apple Mail on Mac does not add signatures to replies by default, but you can enable this in Mail > Settings > Signatures by checking the relevant option for your account. iPhone and iPad Mail do not have a separate setting for this — signatures appear on new messages only.
Many people prefer not to include their signature on every reply, especially in long email threads, because it makes the conversation harder to read. Test what feels right for your work style and adjust the setting if needed.
Creating different signatures for different situations
If you send emails in different roles — for example, as a manager and as a volunteer — you can create multiple signatures and choose which one to use for each message. In Gmail, create several signatures in Settings, then when you compose a new email, click the signature dropdown at the bottom of the compose window and select the one you want. In Outlook on the web, create multiple signatures in Settings, then click the three dots in the compose window, select "Signature", and choose from your list.
Outlook for Windows lets you create a signature for each account separately. Open File > Options > Mail > Signatures, create a new signature, name it clearly (like "Work" or "Volunteer"), and then select which account uses it as the default. You can still manually pick a different signature when composing if you need to. Apple Mail on Mac lets you assign a different signature to each email account — create the signatures in Mail > Settings > Signatures, then select the account and choose its default signature from the dropdown.
Naming your signatures clearly (like "Professional", "Casual", or "Client Work") makes it faster to find the right one when you are composing an email. You can also set one as your default and manually switch to another when needed.
Troubleshooting signatures that do not appear
If your signature is not showing up on your emails, first check that you actually created one and saved it. Go back to your email service's signature settings and confirm the text is there. Then check whether the signature is set as the default for your account — in most services, you have to explicitly select which signature to use by default, and if you did not, it may not appear automatically.
If you created the signature but it only appears on some emails, check whether you have the setting turned on for replies and forwards. In Gmail, signatures appear only on new messages by default, so if you are replying to an email, your signature will not be there unless you manually add it. In Outlook, make sure you have checked the box to include your signature on replies if that is what you want.
If your signature appears but looks wrong — text is misaligned, images are not showing, or formatting is broken — try recreating it with plain text only, no special formatting or images. Test by sending yourself an email and opening it on both desktop and mobile. If the problem persists, contact your email service's support team with a screenshot of what you are seeing.
Moving or copying a signature between email accounts
If you have multiple email accounts and want to use the same signature on all of them, you can usually create it once and then copy the text to each account's signature settings. The easiest way is to open your signature in one account, select all the text (Ctrl+A or Cmd+A), copy it (Ctrl+C or Cmd+C), then go to the other account's signature settings and paste it (Ctrl+V or Cmd+V).
Some email services, like Gmail, let you set a signature that applies to all your accounts at once. In Gmail, if you have multiple accounts linked, you can create a signature in one account's settings and it will be available in all of them — just make sure you are in the right account when you set it up. Outlook on the web does not have a way to share signatures across accounts, so you will need to create or copy the signature separately for each one.
If you switch email providers entirely and want to keep your signature, copy the text from your old signature settings and paste it into your new email service. This works for plain text signatures; if you had images or special formatting, you may need to recreate those in the new service.
Frequently Asked Questions
Can I use HTML code in my email signature?
Some email services support HTML signatures, but most do not make it easy. Gmail and Outlook on the web have basic formatting tools in the signature editor, but they do not let you paste raw HTML code. If you need a complex signature with custom styling, you may need to use a third-party tool or contact your email provider's support team to see if they offer an HTML option.
Will my signature appear the same on mobile as it does on desktop?
Not always. Formatting, font sizes, and images may display differently on phones and tablets. The best way to check is to send yourself a test email and open it on both your phone and computer. If something looks wrong on mobile, simplify the signature — use plain text, smaller font, and no images.
Can I add a signature to emails I send from my phone?
Yes. On iPhone or iPad, go to Settings > Mail > Signature and type your signature text. On Android phones using Gmail, open the Gmail app, tap your profile picture, go to Settings > your email account > Signature, and type your text. The signature will appear on all emails you send from that device.
What should I include in a professional email signature?
A professional signature typically includes your full name, job title, company name, phone number, and email address. You can also add a website URL or LinkedIn profile link. Keep it to four or five lines and use plain text or simple formatting. Avoid personal information like your home address or social media accounts unless your workplace requires it.
Can I have different signatures for different recipients?
Most email services do not have a feature to automatically choose a signature based on who you are emailing. You would need to manually select the right signature when composing each email. Some advanced email tools or plugins may offer this feature, but the built-in email services do not.