Credits and licences
Last updated 2026-10-13
Our own code
The tools and page layouts are written for this site. The pages make no requests to other servers (image addresses you type into a signature or email are loaded by your browser from those addresses).
Third-party material
The data and fonts below are used under their own licences. Signatures, footers, templates and images you make with the tools are yours to use for any purpose; the fonts’ licence allows them to be used in images and documents you create.
| Name | Used for | Licence |
|---|---|---|
| Can I email (caniemail.com) support data, Rémi Parmentier | Which mail programs support each CSS property and HTML feature, used by the email HTML validator, the dark mode check and the notes in the templates and builder (snapshot 13 October 2026, cut down to the features the checks use) | MIT (licence text at /vendor/caniemail/LICENSE) |
| Apache SpamAssassin rules (Apache Software Foundation) | The phrase, subject and link patterns in the spam checker and spam word checker are derived from SpamAssassin's published rule files (rules/20_*.cf and 25_url_shortener.cf); the descriptions are rewritten and no SpamAssassin scores are used | Apache License 2.0 |
| Alex Brush, Allura, Caveat, Great Vibes, Kristi, Pinyon Script, Reenie Beanie and Zeyada fonts (from github.com/google/fonts) | Handwriting styles in the signature generator; served from /fonts/signature/ (Latin subsets in WOFF2) with each font's licence file next to it | SIL Open Font License 1.1 |