Zoho Mail has a source-code view, so you paste the HTML code. Zoho does not handle emoji in signatures well, so leave emoji out of the design.
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Copy the signature code
Download your HTML signature file from your company signature page. Open it in a plain text editor: Notepad on Windows, or TextEdit set to plain text on Mac (Format → Make Plain Text). Select all and copy the code.
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Open Zoho signature settings
- Click the Settings gear, then Signature.
- Click +, and name it Work signature.
- On the editor toolbar, click Insert HTML. Older Zoho layouts hide this under More options → Edit Html.
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Paste the code
- Delete any default content in the source view and paste your HTML.
- Click Apply changes, then Save.
- Associate the signature with the From address you send from, and set it as the default if Zoho asks.
- Compose a test email.