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Guide · Office and email

How to add an email signature with a logo in the iPhone Mail app

By Blink Brief · Updated  · How pages are made

In the iPhone Mail app, the signature is at Settings › Apps › Mail › Signature on iOS 27, 26 and 18 (on iOS 17: Settings › Mail › Signature), and Per Account gives each account its own. Apple's guide is plain about logos: "You can only use text in your Mail signatures." To put a logo on mail you send from your iPhone, send it from the Outlook app, which has an Insert image button, or the Gmail app, which can use the signature you set up on a computer; send yourself a test either way. Pasting a signature whose logo loads from a public web link into iPhone Mail may work, but Apple doesn't support it, so check it on an email you receive.

Short answer

  • Text signature: Settings › Apps › Mail › Signature, then type it. Tap Per Account for one per account.
  • Logo, Gmail or Google Workspace address: send from the Gmail app with Mobile Signature off. Google's help says the app then uses the signature you set up on your computer.
  • Logo, Outlook or Microsoft 365 address: send from the Outlook app and add the logo with Insert image in its signature editor.
  • Logo in iPhone Mail itself: only by pasting, which Apple doesn't support. Send yourself a test before you rely on it.

Where the signature setting is on iOS 27, 26, 18 and 17

From Apple's iPhone User Guide, each version's page:

  • iOS 27 and iOS 26: go to the Settings app, tap Apps, then tap Mail. Tap Signature (below Composing).
  • iOS 18: go to Settings › Apps › Mail, then tap Signature (below Composing).
  • iOS 17: go to Settings › Mail, then tap Signature (below Composing).

Then, in every version: "Tap the text field, then edit your signature."

What Apple allows: text, one signature per account

Every version of Apple's page carries the same line: "You can only use text in your Mail signatures." Apple describes no way to insert a picture. The one choice is how many signatures: "If you have more than one email account, tap Per Account to set a different signature for each account."

On Apple's own forum, people with company logos describe what follows from that. One person found that "the 'paste' option will not come up when entering my signature" while an image is on the clipboard; another could paste "only text in the signature box". An iPad thread about a logo that doesn't show for recipients was closed without a fix.

Three ways to get a logo on mail you send from your iPhone

1. The Gmail app, for a Gmail or Google Workspace address

The Gmail app has its own text signature, Mobile Signature. Google's help: "If you don't create a signature in the Gmail app, new messages use the signature that you set up on your computer." So build the logo signature in Gmail on a computer, and leave Mobile Signature off in the app (Menu › Settings › Signature settings). Google's page doesn't say whether the image itself comes along, so send yourself a test from the phone. The Gmail app guide has every step.

2. The Outlook app, for an Outlook, Hotmail or Microsoft 365 address

Microsoft's message to admins, MC1437668, describes an Insert image button in the signature editor of Outlook for iOS and Android: Choose from photo library, which it calls "the existing behavior", and Choose from files for images in OneDrive, rolling out from late September to late October 2026. The picture is embedded in the email. The Outlook app guide has the steps.

3. Paste a signature with a linked logo into iPhone Mail

This is the route outside Apple's support. It can only work with a linked logo, a picture whose web address is in the signature, because the Signature box won't take an image file. The steps people use:

  1. On a computer, make the signature with your logo at a public https:// link (next section).
  2. Paste it into a new email and send it to the address you read on your iPhone.
  3. On the iPhone, open that email in Mail, select the whole signature, and tap Copy.
  4. Go to Settings › Apps › Mail › Signature, delete the text there, tap in the box, and tap Paste.
  5. Send a new email from the iPhone to a Gmail or Outlook address, and look at what arrives.

If the logo or the formatting is gone in the received email, the paste didn't hold. Use the Gmail or Outlook app instead.

Make the signature to paste

The free Email Signature generator builds a signature with your name, title, phone, website and a logo linked from the https:// address you give it. Fill it in on a computer, press Copy signature, and paste it into the email you send yourself in step 2. It runs in your browser and needs no sign-up.

Whatever made the signature, the logo link has to open the image for anyone, with no sign-in, or the logo is blank for everyone who receives your email. Check it here before you paste.

Check your logo link

To check it by hand:

  1. Open the link in a private browser window. It should show only the logo: no sign-in page and no website around it.
  2. Check that the link starts with https:// and ends in .png or .jpg.
  3. Most browsers show the image's size in pixels in the tab's title. Divide the height by the width and multiply by the width you show it at: that's its height in the signature. Keep it at 100 or less for Gmail.

Check what the recipient sees in Gmail, Outlook and iPhone Mail

Send one email from the iPhone to a Gmail, an Outlook.com and an iCloud address, then open each one:

  • Gmail: the logo should show at once. Google gives 100 pixels high as the maximum for signature images, so a taller logo is a problem here first.
  • Classic Outlook for Windows: a linked logo waits until the reader chooses Download Pictures. Microsoft: Outlook "is configured by default to block automatic picture downloads from the Internet." That's normal, not a fault in your signature.
  • iPhone Mail: if the logo is missing only here, look at the receiving phone's Settings › Apps › Mail › Privacy Protection. Apple Mail calls a linked logo "remote content", and its privacy settings decide when it loads.

When it breaks: missing logo, logo as an attachment, changed font

  • The logo is missing: it didn't survive the paste, or its link isn't public. Run the checker above, then paste again or switch to the Gmail or Outlook app.
  • The logo arrives as an attachment: the picture went into the email as a file. A linked logo doesn't, so make it again with a link.
  • The font or colors changed: the paste kept the words but not the formatting. The Signature box is text-only, so this is what Apple's guide leads you to expect.

Each symptom, app by app: why a signature logo isn't showing. For the signature on your computer, see the Gmail and Outlook steps.

Questions

Can you add a logo to an iPhone email signature?

Not in a way Apple supports. Apple's guide says "You can only use text in your Mail signatures." To send a logo from your iPhone, use the Gmail app with its Mobile Signature off, so it uses your computer signature, or the Outlook app's Insert image button.

Why is my iPhone email signature logo not showing?

Either the logo never made it into the iPhone Mail signature, since Apple's Signature box takes text, or the reader's app is blocking pictures, as classic Outlook does by default. Why a signature logo isn't showing goes through each app.

How do I copy and paste an email signature on iPhone?

Open an email that contains the signature, select the whole signature, and tap Copy. Then go to Settings › Apps › Mail › Signature, tap in the box, and tap Paste. A logo may not come along, because Apple supports text only, so send yourself a test.

Why does my signature logo arrive as an attachment?

The picture was embedded in the email as a file instead of linked from the web, and many email apps list embedded pictures with the attachments. A logo linked from a public https:// address doesn't do that.

Can I have a different signature for each account on iPhone?

Yes. In Settings › Apps › Mail › Signature, tap Per Account and type a signature for each account. Apple: "If you have more than one email account, tap Per Account to set a different signature for each account."

Sources

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