code: @SuppressWarnings("unused")
  	public static MimeMessage signMessageWithDKIM(final MimeMessage messageToSign, final Email emailContainingSigningDetails) {
  		return MimeMessageHelper.signMessageWithDKIM(messageToSign, emailContainingSigningDetails);
  	}
docs: Refer to {@link MimeMessageHelper#signMessageWithDKIM(MimeMessage, Email)}