ConstReadonlystrict: RegExpEMAIL_REGEX - Validates both local and domain parts with specific character rules and structure.
Readonlyunicode: RegExpUnicode-friendly validation.
Allows international characters and relaxed domain rules.
EMAIL_UNICODE_REGEX - Validates email addresses with a focus on practical use and Unicode support, without strict domain structure enforcement.
Predefined email validation presets.
These presets provide different levels of strictness depending on your use case.