/**
 * Email logging transport configuration options
 * Follows libs/core pattern from CacheModuleOptions
 */
export declare class EmailLogOptions {
    /**
     * Enable email log transport
     * @default false
     */
    enabled: boolean;
    /**
     * Minimum log level to trigger email
     * Uses Pino log levels: 'trace', 'debug', 'info', 'warn', 'error', 'fatal'
     * @default 'error'
     */
    level: string;
    /**
     * Recipient email addresses
     */
    to: string[];
    /**
     * CC recipient email addresses (optional)
     */
    cc?: string[];
    /**
     * Sender email address
     */
    from: string;
    /**
     * Email subject prefix
     * Final subject: "[prefix] appName - log level"
     * @default '[Log Alert]'
     */
    subjectPrefix?: string;
    /**
     * SMTP configuration
     */
    smtpHost: string;
    smtpPort?: number;
    smtpUsername?: string;
    smtpPassword?: string;
    smtpSecure?: boolean;
    smtpIgnoreTLSError?: boolean;
    /**
     * Rate limiting configuration
     */
    rateLimitMaxEmails?: number;
    rateLimitWindowMs?: number;
    rateLimitBurstSize?: number;
    /**
     * Email formatting options
     */
    useHtmlFormat?: boolean;
    /**
     * Filtering options
     */
    includeApps?: string[];
    excludeApps?: string[];
    includeErrors?: string[];
    excludeErrors?: string[];
}