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Yahoo Mail — 6 steps, ~2 minutes

Copy button included below
  1. 1

    Sign in to Yahoo Mail and click the Settings icon (gear) in the top right.

  2. 2

    Click "More settings" at the bottom of the panel.

  3. 3

    Click "Writing email" in the left menu.

  4. 4

    Turn on the signature toggle for your email address.

  5. 5

    Click into the signature box and paste your signature.

    Make your signature first →
  6. 6

    Close Settings — Yahoo saves your signature automatically.

Good to know

  • Yahoo's signature box is a simplified rich-text editor, not a raw HTML field — paste the signature itself, not its HTML source, so formatting, links, and images carry over correctly.
  • If you send from more than one address in Yahoo Mail, each one gets its own toggle and text box.
  • Yahoo silently rescales oversized signature images, which breaks layouts for Outlook recipients in other tools. Ours are uploaded at their exact display size, so this doesn't bite here.