Guide5 min read

How to Change Email Signature on iPhone (Mail, Gmail, Outlook)

Step-by-step guide to change your email signature on iPhone. Covers Apple Mail, Gmail, and Outlook apps with tips for HTML signatures on iOS.

How to change email signature on iPhone - step by step guide

Every iPhone comes with a default email signature that says "Sent from my iPhone." While functional, it tells recipients nothing about who you are or how to reach you. Replacing it with a proper signature takes less than a minute and makes every email you send more professional.

This guide covers how to change your email signature on iPhone across all the major mail apps: Apple Mail, Gmail, and Outlook. We also cover how to get an HTML signature working on iOS and common issues you might run into.

How to Change Email Signature on iPhone in Apple Mail

The built-in Mail app is what most iPhone users default to. Here's how to change the signature:

1

Open Settings

Tap the Settings app on your iPhone home screen. It's the gray gear icon.

2

Scroll Down and Tap Mail

Scroll down the settings list until you find Mail. Tap it to open your email settings. On iOS 17 and later, you may need to scroll past several sections.

3

Tap Signature

Scroll to the bottom of the Mail settings screen and tap Signature. This opens the signature editor.

4

Choose Your Signature Mode

At the top, you'll see two options:

  • All Accounts: One signature shared across every email account on your iPhone.
  • Per Account: A different signature for each email account (work, personal, etc.).
5

Edit Your Signature

Tap the text field and delete the default "Sent from my iPhone" text. Type your new signature. A solid basic signature might include:

  • Your full name
  • Job title
  • Phone number
  • Website URL
6

Exit to Save

Tap the back arrow (top-left corner) to return to Mail settings. Your signature saves automatically. There is no separate save button.

Limitation: Apple Mail on iPhone only supports plain text signatures. You cannot add images, logos, or formatted HTML directly through this settings screen. See the HTML signature section below for workarounds.

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How to Change Email Signature on iPhone in Gmail

The Gmail app for iOS has its own separate signature settings. Changing your Gmail web signature does not affect the app, and vice versa.

1

Open the Gmail App

Launch the Gmail app. Make sure you're signed into the account you want to update.

2

Open Settings

Tap the hamburger menu (three horizontal lines) in the top-left corner, then scroll down and tap Settings.

3

Select Your Account

Tap the email account you want to edit the signature for. If you only have one account, tap it directly.

4

Tap Signature Settings

Scroll down to find Signature settings. Tap it.

5

Enable and Edit

Toggle Mobile Signature on. A text field appears where you can type your signature. Enter your details and tap the back arrow to save.

Note: The Gmail app's mobile signature is plain text only and is completely independent from your desktop Gmail signature. If you set up a rich HTML signature on Gmail web, it will not carry over to the app. For a detailed walkthrough of the desktop setup, see our Gmail signature guide.

How to Change Email Signature on iPhone in Outlook

Microsoft Outlook for iOS supports richer signatures than the default Mail app, making it a good option if formatting matters to you.

1

Open Outlook Settings

Open the Outlook app, tap your profile picture or initials in the top-left corner, then tap the gear icon (Settings) at the bottom left.

2

Tap Signature

Under the Mail section, tap Signature. Outlook shows the current default signature.

3

Edit Your Signature

Delete the existing text and type your new signature. Outlook's mobile editor supports basic formatting: bold, italic, underline, and hyperlinks.

4

Set Per-Account Signatures (Optional)

Toggle Per Account Signature if you want different signatures for different Outlook accounts. Each account gets its own editor.

5

Save

Tap the checkmark or navigate back. Your signature saves automatically and appears on all new emails from the Outlook app.

How to Add an HTML Signature on iPhone

If you want a signature with images, logos, social icons, or custom formatting on your iPhone, plain text won't cut it. Here are the methods that work:

Method 1: Copy-Paste from a Browser

  1. Create your HTML signature using a tool like our free signature generator
  2. Open the signature preview in Safari on your iPhone
  3. Long-press and select all the signature content, then copy it
  4. Go to Settings > Mail > Signature
  5. Paste the copied content into the signature field

iOS preserves some HTML formatting when you paste, including basic styles, links, and sometimes images. Results vary by iOS version.

Method 2: Sync from Mac via iCloud

  1. Set up your HTML signature in Apple Mail on your Mac
  2. Make sure both devices are signed into the same iCloud account with Mail syncing enabled
  3. The signature should sync to your iPhone automatically through iCloud
Most reliable approach: Use the Outlook app on iPhone. It has the best HTML signature support of any iOS email app. You can paste formatted content with images and links, and it renders more consistently than Apple Mail.

Method 3: Email Yourself the Signature

  1. Create your signature on a desktop computer
  2. Send it to yourself as the body of an email (not an attachment)
  3. Open the email on your iPhone and select all the signature content
  4. Copy it and paste into your signature settings

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Setting Different Signatures for Each Email Account

Most people have at least two email accounts on their iPhone: one for work and one personal. Using the same signature for both usually doesn't make sense.

Apple Mail

  1. Go to Settings > Mail > Signature
  2. Tap Per Account at the top
  3. You'll see a separate text field for each email account
  4. Enter a unique signature for each one

Gmail App

The Gmail app automatically separates signatures by account. Go to Settings, tap the specific account, and edit its Mobile Signature individually.

Outlook App

Toggle Per Account Signature in the Signature settings. Each linked account gets its own signature editor.

Troubleshooting iPhone Email Signature Issues

Running into problems? Here are the most common issues and fixes:

!

Signature Reverts to Default

This sometimes happens after an iOS update. Go back to Settings > Mail > Signature and re-enter your signature. Some users report that restarting the iPhone after setting the signature helps it stick.

!

Formatting Disappears After Sending

Apple Mail strips some HTML when sending. If your pasted HTML signature loses formatting, try a simpler design with fewer styles, or switch to the Outlook app for better HTML support.

!

Images Not Displaying

If you pasted a signature with images and they don't appear, the images may be using embedded base64 data that iOS stripped out. Use externally hosted images (a URL starting with https://) instead.

!

Signature Shows on Some Accounts but Not Others

Check whether you're in "All Accounts" or "Per Account" mode. If you're in Per Account mode, each account needs its own signature. An empty field means no signature for that account.

Frequently Asked Questions

The default Apple Mail app on iPhone only supports plain text signatures. To use an image or logo, you have two options: use the Gmail or Outlook app which support richer signatures, or create an HTML signature on your Mac or PC and sync it to your iPhone through iCloud.

Apple sets "Sent from my iPhone" as the default signature for all new iPhones. You can change or remove it in Settings > Mail > Signature. Many professionals replace it with their actual contact details or leave it blank.

Yes. In Settings > Mail > Signature, tap "Per Account" instead of "All Accounts." This lets you set a unique signature for each email account configured on your iPhone, such as separate work and personal signatures.

Open Safari on your iPhone and navigate to an HTML signature you have created (or email it to yourself). Copy the rendered signature, then go to Settings > Mail > Signature and paste it. iOS will preserve some HTML formatting when pasted this way, though results vary by iOS version.

No. iPhone and desktop email signatures are separate. Changing your signature in iPhone Mail does not affect your Gmail web signature, Outlook desktop signature, or any other client. You need to update each platform independently.

The Apple Mail app on iPhone has limited HTML support for signatures. Complex formatting, tables, and certain styles may be stripped or simplified when sent. For reliable formatted signatures, use the Gmail or Outlook app on iPhone, or keep your Apple Mail signature plain text.