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How to create an HTML iPhone email signature
TL;DR
Go to Settings > Apps > Mail > Signature on current iOS to replace "Sent from my iPhone" with your own text (on iOS 17 or earlier, it's Settings > Mail > Signature directly)
For a logo or formatting, build an HTML signature elsewhere, then copy and paste it into the iPhone Signature settings
Manual, per-device setup means signatures render differently across Apple Mail, Gmail, and Outlook, and someone has to catch the breakage
Exclaimer applies a consistent, professional signature to every device automatically, no copying and pasting required
Want to remove the default ‘Sent from my iPhone’ line and replace it with a professional email signature? Whether you’re working from your phone or managing mobile devices across your organization, this guide walks you through the steps to update your iPhone email signature in just a few taps.
You’ll learn how to format a clean, branded sign-off in Apple Mail, how to use HTML signatures on iOS, and why iPhone email signatures often go wrong. Plus, we’ll show you how to stop managing email signatures one device at a time.
Tip
A consistent, branded iPhone email signature shows your attention to detail, especially when you're replying from a mobile device.
Do iPhone email signatures matter for professionals?
Even one poorly formatted email can make your business look unprofessional.
iPhones are everywhere in the workplace, but most people never update their default signature. That “Sent from my iPhone” line? It’s more noticeable than you think, and it's costing you more than you'd expect: 70% of consumers say they feel frustrated when a business's email signature omits basic contact information, according to Exclaimer's 2023 consumer research with Censuswide.
Here’s why updating your iPhone email signature is worth the few minutes it takes:
Brand consistency: A clean, branded signature shows that you pay attention to detail—even on mobile.
Professionalism: Including your job title, company name, and contact details helps the recipient know who you are and how to reach you.
Compliance: If you work in a regulated industry, legal disclaimers may need to appear on every email, no matter what device it’s sent from.
Mobile optimization: Signatures that look great on desktop can break on mobile. Tailoring your iPhone signature prevents formatting issues and missing logos.
That same research found more than half of consumers (58%) say a professional, branded email signature makes them trust an email from a business. It also found a real generational split: 61% of consumers aged 18 to 34 want social media or website links included in a signature, compared with just 19% of those 55 and older.
Getting that balance right doesn't matter if the formatting falls apart the moment it hits an iPhone.
If you're managing email across a team or department, it's faster and safer to apply signatures centrally, rather than configuring each iPhone manually.
How to change your iPhone email signature
Here’s how to replace “Sent from my iPhone” with your own custom iPhone email signature:
Step-by-step instructions to add a signature on iPhone
Tip
Since iOS 18, Apple moved app-specific settings, including Mail's, into a new Apps section. If Mail isn't listed directly on the main Settings screen, that's why. On iOS 17 or earlier, skip the Apps step below and tap Mail directly.
Open the Settings app on your iPhone.
Scroll down and tap Apps, then tap Mail. (iOS 17 or earlier: tap Mail directly, no Apps step.)
Tap Signature, listed under Composing.
Under All Accounts or Per Account, delete the default signature, usually labeled as "Sent from my iPhone."
Type in your new email signature. This can include your name, job title, or contact information.
To add basic formatting like Bold, Italic, or Underline, double-tap the text you want to change.
Tap the BIU option that appears above the highlighted text and select your desired style.
Tap the back arrow in the top-left corner to save your changes. You'll return to the Mail settings screen.
And that's it! You've successfully customized your iPhone email signature. Whether it's for personal or professional use, a well-designed email signature makes a great impression.
Tips for iPad users
If you use an iPad, follow the same steps as above: Settings > Apps > Mail > Signature.
On an iPad's split-screen Settings view, tap Apps in the left pane, then Mail, then scroll the right pane until you find Signature.
How to add an image to your iPhone email signature
Looking to make your iPhone email signature more professional and eye-catching? Adding an image, like your logo or social media icons, can make your signature stand out.
Unfortunately, the default Apple Mail app doesn’t make it easy to include images. It only allows for basic formatting, and copying and pasting an image into the signature settings won’t work.
But don’t worry—there’s an easy way to add an HTML email signature template with images to your iPhone. Just follow these simple steps to create a professional email signature:
Step-by-step guide to add an HTML image to iPhone email signatures
1. Create your HTML email signature template
Use an email client that supports HTML to design your iPhone signature.
Include important elements like your logo and social media icons for a polished look.
2. Send or save your signature
Compose a new email with your HTML signature.
You can either save this email as a draft or send it to yourself so you can access it on your iPhone.
3. Copy the signature to your iPhone
Open the email on your iPhone.
Highlight any part of the signature text that is not a clickable link.
Tap Select All, then Copy from the context menu.
4. Paste into the iPhone signature settings
Go to your iPhone settings: Settings > Apps > Mail > Signature (iOS 17 or earlier: Settings > Mail > Signature).
Delete any existing text.
Tap and hold the screen to bring up the menu.
Select Paste to insert your HTML iPhone signature.
5. Fix formatting with undo
After pasting, the formatting may look wrong at first. That's because iOS Mail re-applies its own default text attributes the moment you paste, which strips out the HTML styling you just brought in.
Shake your iPhone to trigger the Undo Change Attributes option, then tap Undo. This reverses that auto-reformatting and restores the correct HTML formatting.
If shaking doesn't bring up the Undo prompt, check Settings > Accessibility > Touch > Shake to Undo is turned on. If you'd rather not shake the phone, swipe left with three fingers to trigger the same Undo prompt.
6. Save and test your signature
Tap the back arrow in the top-left corner to save your updated signature.
Send a test email to ensure everything displays correctly before using it.
Set different iPhone signatures per account
Open the Settings app on your iPhone.
Scroll down and tap Apps, then tap Mail (iOS 17 or earlier: tap Mail directly).
Tap the Signature option.
Select Per Account to enable different signatures for each email account.
Delete the default "Sent from my iPhone" message.
Type or paste your new iPhone signature.
Exit the Settings app and open the Mail app to see your new iPhone signature.
Tip
This only changes the signature inside Apple's own Mail app. If you also use the Gmail app or the Outlook app on the same iPhone for the same account, each one has its own, separate signature setting, and changing one doesn't change the others. Set the signature in whichever app you actually send from, or update all three if you switch between them.
Troubleshooting iPhone email signature issues
Running into problems with your iPhone email signature not displaying correctly? You’re not alone.
Here are common issues and how to fix them.
Signature looks “plain” or text-only
Copy the signature from a browser (not a plain text editor). Use Safari or Apple Mail, and avoid editing after pasting.
Images are missing or broken
Use HTTPS image URLs that are publicly hosted. iOS won’t render locally stored images or those behind firewalls.
Image shows as a blank box or question mark right after pasting
This is usually Mail's Privacy Protection blocking remote content, not a broken signature. Check Settings > Apps > Mail > Privacy Protection.
If Protect Mail Activity is on, remote images load automatically but privately, so this is rarely the cause; if it's off, check that Block All Remote Content isn't switched on.
Also confirm you have a working internet connection when you first open the email, since Mail needs to fetch the image once before it caches it.
Extra line breaks or spacing
Avoid hitting Enter multiple times. Use inline styles or tables when building your signature to manage layout.
“Sent from my iPhone” keeps reappearing
Check if you have multiple email accounts and updated them all. Restart the Mail app to refresh the settings.
Looking for an easier way?: Exclaimer automatically applies compliant, branded email signatures across every device, iPhones included.
How to centrally manage iPhone email signatures
Getting consistent email signatures on iPhones across your company sounds simple—until you try it.
Managing one iPhone is easy enough. But managing everyone's signature? That’s a whole different challenge.
The only way to effectively centrally manage multiple iPhone email signatures is to use an email signature management tool like Exclaimer.
The dangers of unmanaged iPhone email signatures
Without a centralized email signature manager, someone might accidentally mess up the design, create their own version, or skip using it altogether. Not exactly ideal for maintaining a polished, professional brand image.
Even if employees manage to use the right signature, chances are your formatting won’t align with your brand guidelines. And don’t forget the missed marketing opportunities from not having centralized control over your iPhone email signatures.
But here’s the biggest issue: there’s no guarantee your iPhone email signature will display correctly. This can vary across different email clients. Each one interprets HTML differently, meaning your new signature could break when sending emails.
Why does the same signature look different on every device?
A signature that looks fine on the iPhone it was set up on can still arrive broken for the person reading it, because different email clients render HTML differently. Apple Mail (across iPhone, iPad, and Mac) accounts for 64.66% of email opens tracked by Litmus in its May 2026 Email Client Market Share report, with Gmail at 24.11% and Outlook desktop at 6.49%. Between them, Apple Mail and Gmail alone cover close to 90% of where a signature actually gets read, and a signature that's fine in one can still land broken in the other.
Multiply that by every employee doing their own copy-paste-and-shake-to-undo routine on their own phone, on their own schedule, and the "unmanaged signature" problem stops being theoretical for the IT team stuck fixing it one device at a time.
"You can't fix signature consistency by tuning one client's settings, because your employees are drafting mail from a dozen different apps IT doesn't control. That's why we built out platform to use a server-side deployment so the signature gets added during transport, after the message leaves the device."
Why use Exclaimer for iPhone email signatures?
Looking for a simple way to create professional email signatures that look great on all devices, including iPhones?
With Exclaimer email signature software, you can easily design and manage consistent iPhone email signatures across your entire organization. Its device deployment functionality applies the signature directly, so nobody has to copy, paste, and shake-to-undo their way through it on their own phone.
No more broken images, manual adjustments, or tricky iOS settings. Just seamless, professional signatures for every iPhone email.
Take control of your corporate branding with Exclaimer, the trusted solution for email signature management. Start a free trial and see how easy it is to automate and scale email signatures across teams and devices.
