How to Add an Email Signature in iCloud Mail (icloud.com)
Here's the thing nobody tells you: Apple keeps THREE separate signature stores — Mac Mail, iPhone Mail, and iCloud.com webmail. This guide covers the webmail one, and how to line all three up.
Step by step
Sign in to iCloud Mail
Go to icloud.com/mail and sign in with your Apple ID.
Open Mail settings
Click the gear icon at the top of the mailbox list, then Settings (in some layouts it's labeled Preferences).
Go to Composing
Select the Composing tab.
Enable the signature
Check “Add a signature” and type it in the text box. Formatting here is basic — iCloud webmail signatures are essentially plain text.
Save
Click Done. The signature now applies to email you send from icloud.com in a browser — and only there.
Line up your other Apple signatures
Your Mac's Apple Mail signature and your iPhone's signature are stored separately: set the Mac one in Mail → Settings → Signatures (or with Autograph in one click), and the iPhone one via Settings → Apps → Mail → Signature — see our iPhone guide for images that survive.
One signature across Mac, iPhone, and beyond
Autograph installs your designed signature into Apple Mail in one click, sets up your iPhone with a QR code, and Copy HTML covers webmail — one design, everywhere you send.
Download Autograph free See the templatesCommon questions
Why is my iCloud.com signature different from my Mac's?
They're independent stores. iCloud Drive syncs Mac Mail signatures between Macs, but icloud.com webmail and iPhone each keep their own signature.
Can I use images or HTML in the iCloud.com signature?
Effectively no — the webmail signature box is plain text with minimal formatting. For a designed signature, send from Apple Mail (where Autograph installs it) rather than the browser.
Which signature do recipients see?
Whichever client you sent from: Mac Mail uses the Mac signature, iPhone Mail the iPhone one, icloud.com the webmail one. Keeping them consistent is manual — or one click + one QR scan with Autograph.