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Apple Mail · 4 min read

How to add an HTML email signature in Apple Mail

Apple Mail keeps formatting from a pasted signature, as long as you switch off one setting first. On iPhone and iPad there's a small trick to stop Mail from flattening your design.

  1. 1

    Copy your signature

    In DigiSignature, open your signature and click Copy signature.

  2. 2

    Open Mail settings on Mac

    In Mail, choose Mail → Settings (or Preferences on older macOS), then click the Signatures tab.

  3. 3

    Create a new signature

    Select your account on the left, click +, and give the signature a name.

  4. 4

    Turn off font matching

    Uncheck “Always match my default message font” below the editor. This keeps your signature's fonts and colors.

  5. 5

    Paste and choose it

    Click into the editor, delete the placeholder text, paste with ⌘+V, then pick it from the Choose Signature menu.

  6. 6

    On iPhone or iPad

    Email the signature to yourself, copy it from that email, then go to Settings → Apps → Mail → Signature and paste. If it turns plain, shake the device and tap Undo to restore the formatting.

Good to know

  • Mac signatures sync through iCloud on some setups but not all — check each device after installing.
  • Apple Mail's dark mode inverts some colors. Logos with transparent backgrounds and a light outline stay readable.
  • Close and reopen Mail after installing so new messages pick up the signature.

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