How to Add an Email Signature in Yahoo Mail
Yahoo Mail's signature editor is simple once you find it — it's two menus deep. Here's the walkthrough, plus the mobile-app catch.
Step by step
Open the settings menu
In Yahoo Mail on the web, click Settings (gear icon, top right) → More Settings at the bottom of the panel.
Go to Writing email
Select Writing email in the left sidebar.
Turn the signature on
Under Signature, flip the toggle next to your email account.
Write your signature
A rich-text box appears — type your details and format them. Yahoo saves automatically as you edit.
Add an image (carefully)
Yahoo's editor accepts pasted rich content, but images only survive for recipients when they're hosted web images (https URLs) — pasting a picture file tends to break. Paste a hosted-image signature (e.g. from Autograph's Copy HTML) rather than inserting files.
Test it
Compose a new email — the signature should be pre-filled. Send yourself a test and check it in another mail client.
Set up the mobile app separately
The Yahoo Mail app has its own signature: in the app, profile icon → Settings → Signatures — it doesn't inherit the web one.
Want the same signature in Apple Mail and Yahoo?
Design it once in Autograph — one click installs it into Apple Mail, and Copy HTML gives you the exact same signature to paste into Yahoo's editor, hosted images included.
Download Autograph free See the templatesCommon questions
Why did my Yahoo signature disappear?
The per-account toggle under Writing email is off, or you're composing from a different Yahoo address than the one the signature is enabled for.
Can I use HTML in a Yahoo signature?
Not directly — there's no HTML source view. The reliable path is pasting an already-rendered rich signature whose images are hosted online, which Yahoo's editor preserves.
Why do recipients see my image as broken?
The image was pasted as a file instead of referencing a hosted https URL. Rebuild the signature from hosted-image HTML.