/**
 * Validates an email address format according to basic RFC standards.
 *
 * This is intentionally pragmatic rather than a full RFC 5322 parser: it rejects
 * the address shapes that never deliver (missing parts, consecutive dots, leading
 * or trailing dots, hyphen-bounded domain labels) while accepting the long tail
 * of legitimate real-world addresses.
 * @param email The email address string to validate.
 * @returns True if the email address is syntactically valid, false otherwise.
 * @example
 * ```ts
 * import { validateSyntax } from "@visulima/email-verifier/checks/syntax";
 *
 * validateSyntax("user@example.com"); // true
 * validateSyntax("user@@example.com"); // false
 * ```
 */
declare const validateSyntax: (email: string) => boolean;
export { validateSyntax as default, validateSyntax };