Internationalisation
Unicode, language, direction, and international addresses.
3 topics in this category.
UTF-8 Encoding & Multilingual Message Bodies
RequiredStandardize on end-to-end UTF-8 encoding across email headers and MIME bodies using Quoted-Printable or Base64 transfer encodings to prevent character corruption.
Language Direction & Right-to-Left (RTL) Layouts
RecommendedArchitect bidirectional and Right-to-Left (RTL) email layouts with document-level dir="rtl" declarations, mirrored table alignments, and isolated BiDi spans.
Internationalized Email Addresses (EAI) & Punycode
RecommendedSupport Internationalized Domain Names (IDN) via Punycode and handle non-ASCII local-parts using RFC 6530 Email Address Internationalization (EAI) and SMTPUTF8.