The following changelog provides a versioned history of updates to the Open Email Standards, including specification refinements, security clarifications, and newly approved resources.
v1.0.3
2025-09-12- Docs: Clarified wording in Interactive & Media intro (removed “email-specific elements” ambiguity).
- Resources: Finalized Embed Platforms list; Facebook excluded; Twitch excluded.
- Fonts: Bunny Fonts approved as a trusted font CDN provider.
v1.0.2
2025-09-07- Security: Disallowed CSS
cursor; clarifiedcontent: url(...)allowed and subject to image blocking. - Validation: Base64 images discouraged (size/filters), not prohibited.
- Docs: Added “Sandbox Configuration Guidelines for Email Clients” under 3.4.6.
- Resources: Spotify and TikTok added to Approved Embed Platforms.
v1.0.1
2025-09-02- DTD: Added
<picture>; clarified<map>/<area>support. - Forms: Prohibited
<input type="search">and<search>tag. - Security: Prohibited
<base>element. - Fonts: Approved Google Fonts and Fontshare.
v1.0.0
2025-08-25- Spec: Initial Open Email Standards publication (HTML5, CSS3 & JavaScript).
- JS: Only pre-approved libraries (e.g., Vue, Preact); raw JS disallowed.
- DTD: Published
email.dtdwith Allowed Body Elements and structural rules. - CDNs: Approved jsDelivr, UNPKG, Cloudflare CDN, Email 5 CDN.
- Resources: New Font Providers section.