Step-by-step iOS instructions to remove or change the default 'Sent from my iPhone' email signature, the Per Account trap that catches everyone, and what actually belongs in a mobile signature.
The MailSigCraft Team
MailSigCraft
"Sent from my iPhone" has been the default Apple Mail signature since 2007. It's still the first thing every recipient sees on every email you send from your phone — until you change it. The change itself takes 30 seconds; the part that catches people out is the Per Account trap, the iCloud Sync reset, and figuring out what should actually go there instead.
This guide covers all three: the exact iOS settings path, the gotchas that quietly undo your change, and a mobile signature template that won't break in a recipient's inbox.
If you just want it gone right now and don't care about the gotchas, here are the four taps:
On iOS 18 and later, signature settings moved into the per-app section. Open Settings, scroll down to Apps, find Mail. On older iOS (17 and below), the path is Settings → Mail directly.
Under the Composing heading, tap Signature. This is where the "Sent from my iPhone" text lives.
At the top: All Accounts uses one signature for every mailbox; Per Account lets you set a different signature for each. Most people pick All Accounts and move on — but read the gotcha section below first, because Per Account is the trap that resets people's changes.
Tap into the text field, select all, delete. Type your new signature. Tap back. iOS saves the change automatically — no Save button.
Send yourself a test email. The new signature shows up immediately on the next message you compose. No restart, no sync wait.
This is where most "I changed it but it's still showing up" complaints come from. Each one is silent — there's no error message, just the wrong signature on the next email.
If you ever tap Per Account in the signature picker, iOS creates a separate signature text field for each email account on the device. Setting All Accounts back to your custom signature does not propagate to the per-account fields — those keep whatever was last in them, which is usually still "Sent from my iPhone" for the accounts you didn't manually edit.
The fix: if you have multiple email accounts (Gmail + iCloud + work), either commit to All Accounts and never touch Per Account, or commit to Per Account and edit each one. Mixing them is what causes the "I changed it but my work email still says Sent from my iPhone" reports.
If you restore your iPhone from an iCloud backup — or set up a new iPhone using Quick Start from your old one — the signature setting comes along with the rest of your Mail preferences. Except: if iCloud's "Settings sync" got out of sync mid-restore, the signature can revert to "Sent from my iPhone" silently and the change you made on day one is gone.
The fix: after any device restore or migration, re-check Settings → Apps → Mail → Signature. It's the one Mail setting that's worth verifying every time you move devices.
The iOS Signature field accepts plain text by default. You can apply basic Bold, Italic, Underline with the keyboard shortcut bar, and you can change text alignment. But: font color, font face, font size, links, and images are all silently stripped when you type them in.
The fix: to get a real HTML signature on iPhone Mail, you can't type it — you have to email the finished signature to yourself, open the email in Mail, long-press, Select All, Copy, then paste it into the Signature field. This preserves the formatting iOS would otherwise strip. The trick works, but every richly formatted iOS signature is one bad paste away from losing its styling.
iOS Mail uses the same signature for new emails AND replies. There's no separate "reply signature" field like Gmail and Outlook desktop have. If you set up a big multi-line signature with logo, title, and links, every reply you send from your phone will carry that full block — making short replies in long threads look bloated.
The fix: keep your iOS signature shorter than your desktop signature. The mobile signature is the one that ends up at the bottom of every back-and-forth, so the "less is more" rule applies more aggressively here than on desktop.
Once the default is gone, the next question is what belongs there. The trap most people fall into is treating mobile like desktop — copying their full desktop signature into the iOS field and ending up with a 6-line block under every two-word reply. The opposite trap is leaving it blank, which loses the small-but-real branding moment.
The polite variant of the default. It announces "I'm on mobile" but adds nothing — recipients already know mobile typos exist. And it doubles down on the "I didn't change the signature" signal.
Skip it.
Logo + headshot + title + phone + LinkedIn + address + disclaimer — all crammed into a 320 px-wide mobile column, stacking awkwardly, breaking on every reply in a thread.
Mobile is not desktop. This is the version that makes long email threads look bloated.
Jane Smith
Founder, Acme — acme.com
Three lines, sub-100 characters, identifies you and gives one place to learn more. Doesn't carry an image, so it never breaks. Doesn't repeat in threads in a distracting way.
Many people who care about email keep two signatures: a tight 2–3 line mobile signature (just name + role + one link) and a full HTML signature on desktop. Recipients see the polished version on first contact (desktop) and the lightweight version on quick replies (mobile). MailSigCraft generates both from the same source so they stay consistent.
If you want logo, brand color, and clickable links — not just plain text — here's the trick that works:
Use the MailSigCraft editor or any HTML signature tool. Copy it to your clipboard.
Compose a new email on desktop (not on your phone), paste the signature into the body, send it to the address you have set up on your iPhone.
Open Mail on iPhone, open the email you just sent, long-press inside the signature block, Select All, Copy.
Open Settings → Apps → Mail → Signature. Paste. The signature usually pastes with iOS's quote-block formatting applied. Shake the phone to bring up the "Undo Change Attributes" dialog and tap Undo — this strips iOS's added blue bar without removing your formatting.
This works, but the signature can lose formatting any time you edit it inside the Signature field, every time you switch between Per Account fields, and occasionally after iOS updates. Re-paste from a fresh email if styling breaks.
The diagnostic shortcut: if you changed the signature and a recipient still sees the wrong one, it's always one of these four things.
Before you assume it's working:
Compose a new email to yourself from the iPhone. The new signature should be there.
If you have multiple accounts, test from each one. Switch the From address in the Compose screen and check the signature on each — this catches the Per Account trap.
Reply to an email from someone else. The signature should appear at the bottom of the reply, not stack with the original sender's signature in an ugly way.
If you used the HTML paste trick, open the test email on a non-iPhone client (Gmail web, Outlook desktop) and confirm the logo and links render. iOS Mail sometimes previews HTML differently than recipients will actually see.
There's a school of thought that "Sent from my iPhone" is doing useful work — it explains short, terse replies and tells the recipient to forgive typos. That argument was strong in 2010. In 2026, every recipient assumes you might be on mobile already, and the same line stamped on millions of emails has lost any signalling power it had.
If you genuinely want to flag mobile-ness, a custom line works better: "Sent from mobile — happy to send a longer version from desktop later" reads as deliberate. The default doesn't.
But the most common case is no pretext at all: just a tight name + role + link, the same signal you'd send from desktop, sized for the smaller screen.
The reason "Sent from my iPhone" sticks around for years is that updating it well — making it match your desktop signature, surviving iOS updates, keeping it tight on replies — has historically been fiddly. MailSigCraft builds the desktop HTML signature, the mobile plain-text fallback, and the email-to-self paste-source from one set of inputs, so the version on your iPhone matches the version recipients see from your Mac.
If you've been meaning to update your mobile signature for a while, the change itself is the easy part. The harder part is making sure it stays changed — and that's just the four traps above.
The same name + role + link, but with a small logo (60×60 px or smaller) and your brand color on the role line. Pasted using the email-to-self trick so the formatting survives.
Keep total width under 360 px and total height under 100 px so it doesn't dominate replies on small screens.