import bitel.billing.server.util.*;
import javax.activation.DataHandler;
import javax.activation.DataSource;
import javax.activation.FileDataSource;
import javax.mail.*;
import javax.mail.internet.*;
import java.util.*;
import java.text.*;

//Получаем текущую дату
long curTime = System.currentTimeMillis();
String curStringDate = new SimpleDateFormat("dd.MM.yy").format(curTime);

Email = "mail@gmail.com";
mm = new MailMsg(setup);
String attachment = "C:/TC310112.999";
String subject = "Реестр в СберБанк " + curStringDate;

Multipart multipart = new MimeMultipart();
MimeBodyPart attachmentBodyPart = new MimeBodyPart();
        DataSource source = new FileDataSource(attachment);
        attachmentBodyPart.setDataHandler(new DataHandler(source));
        attachmentBodyPart.setFileName(MimeUtility.encodeText(source.getName()));
        multipart.addBodyPart(attachmentBodyPart);

mm.sendMessage(Email, subject , multipart);