Installation & advice
How HTML email signatures work
Email clients support a smaller set of HTML and CSS than browsers. A conservative layout is more dependable across clients.
Why InboxSig uses tables
- The generated signature uses nested presentation tables, inline styles and web-safe fonts. Images use absolute HTTPS addresses and explicit dimensions.
- There are no scripts, external stylesheets, background images or web fonts inside the signature. Social icons are small hosted PNG files.
Copy content or source?
- Copy signature puts rich HTML and a text alternative on the clipboard. Paste that into a rich signature editor.
- Copy HTML is for an editor that explicitly accepts source. Pasting raw HTML into a visual editor usually displays the tags as text. Client rendering still varies; test before rolling out.
Menus vary by release and account policy. Instructions reviewed 19 Oct 2026. Official documentation ↗
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