/**
 * Event details relating to an email transaction.
 * This field set focuses on the email message header, body, and attachments. Network protocols that send and receive email messages such as SMTP are outside the scope of the `email.*` fields.
 */
export interface EcsEmail {
    /**
     * A list of objects describing the attachment files sent along with an email message.
     */
    attachments?: Record<string, unknown> | Array<Record<string, unknown>>;
    bcc?: {
        /**
         * The email address of BCC recipient
         */
        address?: string | Array<string>;
    };
    cc?: {
        /**
         * The email address of CC recipient
         */
        address?: string | Array<string>;
    };
    /**
     * Information about how the message is to be displayed.
     * Typically a MIME type.
     */
    content_type?: string;
    /**
     * The date and time when the email message was received by the service or client.
     */
    delivery_timestamp?: string;
    /**
     * The direction of the message based on the sending and receiving domains.
     */
    direction?: string;
    from?: {
        /**
         * The email address of the sender, typically from the RFC 5322 `From:` header field.
         */
        address?: string | Array<string>;
    };
    /**
     * Unique identifier given to the email by the source that created the event.
     * Identifier is not persistent across hops.
     */
    local_id?: string;
    /**
     * Identifier from the RFC 5322 `Message-ID:` email header that refers to a particular email message.
     */
    message_id?: string;
    /**
     * The date and time the email message was composed. Many email clients will fill in this value automatically when the message is sent by a user.
     */
    origination_timestamp?: string;
    reply_to?: {
        /**
         * The address that replies should be delivered to based on the value in the RFC 5322 `Reply-To:` header.
         */
        address?: string | Array<string>;
    };
    sender?: {
        /**
         * Per RFC 5322, specifies the address responsible for the actual transmission of the message.
         */
        address?: string;
    };
    /**
     * A brief summary of the topic of the message.
     */
    subject?: string;
    to?: {
        /**
         * The email address of recipient
         */
        address?: string | Array<string>;
    };
    /**
     * The name of the application that was used to draft and send the original email message.
     */
    x_mailer?: string;
}