javax.mail.internet.MimeMessage#saveChanges ( )源码实例Demo

/**
 * 创建一封只包含文本的简单邮件
 *
 * @param session     和服务器交互的会话
 * @param sendMail    发件人邮箱
 * @param receiveMail 收件人邮箱
 * @return
 * @throws Exception
 */
private MimeMessage createMimeMessage(Session session, String sendMail, String receiveMail, String title, String content) throws Exception {
	// 1. 创建一封邮件
	MimeMessage message = new MimeMessage(session);

	// 2. From: 发件人
	message.setFrom(new InternetAddress(sendMail, "昵称", "UTF-8"));

	// 3. To: 收件人（可以增加多个收件人、抄送、密送）
	message.setRecipient(MimeMessage.RecipientType.TO, new InternetAddress(receiveMail, "XX用户", "UTF-8"));

	// 4. Subject: 邮件主题
	message.setSubject(title, "UTF-8");

	// 5. Content: 邮件正文（可以使用html标签）
	message.setContent(content, "text/html;charset=UTF-8");
	// 6. 设置发件时间
	message.setSentDate(new Date());

	// 7. 保存设置
	message.saveChanges();

	return message;
}
 

/**
 * Case 3:
 * A non-text content object ignores a default charset entirely.
 * @throws Exception on any error
 */
@Test
public void testDefaultCharsetIgnoredByNonTextContent()
    throws Exception
{
    email.setHostName(strTestMailServer);
    email.setSmtpPort(getMailServerPort());
    email.setFrom("[email protected]");
    email.addTo("[email protected]");
    email.setSubject("test mail");

    email.setCharset("ISO-8859-1");
    email.setContent("test content", "application/octet-stream");
    email.buildMimeMessage();
    final MimeMessage msg = email.getMimeMessage();
    msg.saveChanges();
    assertEquals("application/octet-stream", msg.getContentType());
}
 

@Test
public void testCorrectContentTypeForPNG() throws Exception
{
    email.setHostName(strTestMailServer);
    email.setSmtpPort(getMailServerPort());
    email.setFrom("[email protected]");
    email.addTo("[email protected]");
    email.setSubject("test mail");

    email.setCharset("ISO-8859-1");
    final File png = new File("./target/test-classes/images/logos/maven-feather.png");
    email.setContent(png, "image/png");
    email.buildMimeMessage();
    final MimeMessage msg = email.getMimeMessage();
    msg.saveChanges();
    assertEquals("image/png", msg.getContentType());
}
 

@Test
public void testFoldingHeaders() throws Exception
{
    email.setHostName(strTestMailServer);
    email.setSmtpPort(getMailServerPort());
    email.setFrom("[email protected]");
    email.addTo("[email protected]");
    email.setSubject("test mail");

    final String headerValue = "1234567890 1234567890 123456789 01234567890 123456789 0123456789 01234567890 01234567890";
    email.addHeader("X-LongHeader", headerValue);

    assertTrue(email.getHeaders().size() == 1);
    // the header should not yet be folded -> will be done by buildMimeMessage()
    assertFalse(email.getHeaders().get("X-LongHeader").contains("\r\n"));

    email.buildMimeMessage();

    final MimeMessage msg = email.getMimeMessage();
    msg.saveChanges();

    final String[] values = msg.getHeader("X-LongHeader");
    assertEquals(1, values.length);

    // the header should be split in two lines
    final String[] lines = values[0].split("\\r\\n");
    assertEquals(2, lines.length);

    // there should only be one line-break
    assertTrue(values[0].indexOf("\n") == values[0].lastIndexOf("\n"));
}
 

/**
 * Takes the message and adds a header to it.
 *
 * @param mail the mail being processed
 * @throws MessagingException if an error arises during message processing
 */
@Override
public void service(Mail mail) throws MessagingException {
    MimeMessage message = mail.getMessage();
    Classifier classifier = new Classifier(message);
    String classification = classifier.getClassification();
    //if ( !classification.equals("Normal") ) {
    message.setHeader(headerName, classification);
    message.saveChanges();
    //}
}
 

@Test
public void isMdnSentAutomaticallyShouldBeDetected() throws Exception {
    MimeMessage message = new MimeMessage(Session.getDefaultInstance(new Properties()));
    MimeMultipart multipart = new MimeMultipart();
    MimeBodyPart scriptPart = new MimeBodyPart();
    scriptPart.setDataHandler(
            new DataHandler(
                    new ByteArrayDataSource(
                        Joiner.on("\r\n").join(
                            "Final-Recipient: rfc822;[email protected]",
                            "Disposition: automatic-action/MDN-sent-automatically; displayed",
                            ""),
                            "message/disposition-notification;")
                    ));
    scriptPart.setHeader("Content-Type", "message/disposition-notification");
    multipart.addBodyPart(scriptPart);
    message.setContent(multipart);
    message.saveChanges();

    FakeMail fakeMail = FakeMail.builder()
            .name("mail")
            .sender("[email protected]")
            .mimeMessage(message)
            .build();

    assertThat(new AutomaticallySentMailDetectorImpl().isMdnSentAutomatically(fakeMail)).isTrue();
}
 

@Test
public void isMdnSentAutomaticallyShouldDetectBigMDN() throws Exception {

    MimeMessage message = MimeMessageUtil.defaultMimeMessage();
    MimeMultipart multipart = new MimeMultipart();
    MimeBodyPart scriptPart = new MimeBodyPart();
    scriptPart.setDataHandler(
        new DataHandler(
            new ByteArrayDataSource(
                Joiner.on("\r\n").join(
                    "Final-Recipient: rfc822;[email protected]",
                    "Disposition: automatic-action/MDN-sent-automatically; displayed",
                    ""),
                "message/disposition-notification;")
        ));
    scriptPart.setHeader("Content-Type", "message/disposition-notification");
    BodyPart bigBody = MimeMessageBuilder.bodyPartBuilder() // ~3MB
        .data("12345678\r\n".repeat(300 * 1024))
        .build();
    multipart.addBodyPart(bigBody);
    multipart.addBodyPart(scriptPart);
    message.setContent(multipart);
    message.saveChanges();

    FakeMail fakeMail = FakeMail.builder()
        .name("mail")
        .sender(MailAddressFixture.ANY_AT_JAMES)
        .mimeMessage(message)
        .build();

    assertThat(new AutomaticallySentMailDetectorImpl().isMdnSentAutomatically(fakeMail)).isTrue();
}
 

@Test
public final void testCapabilityExtraArguments() throws Exception {
    MimeMessage message = prepareMimeMessage("CAPABILITY");
    Mail mail = createUnauthenticatedMail(message);
    message.setSubject("CAPABILITY extra");
    message.saveChanges();
    mailet.service(mail);
    ensureResponse("Re: CAPABILITY extra", "NO \"Too many arguments: extra\"");
}
 

@Override
public void service(Mail mail) throws MessagingException {
    MimeMessage message = mail.getMessage();

    message.addHeader(headerName, headerValue);
    message.saveChanges();
}
 

/**
 * Saves changes resetting the original message id.
 *
 * @param message the message to save
 */
protected final void saveChanges(MimeMessage message) throws MessagingException {
    String messageId = message.getMessageID();
    message.saveChanges();
    if (messageId != null) {
        message.setHeader(RFC2822Headers.MESSAGE_ID, messageId);
    }
}
 

public void send(String to, String cc, String bcc, String subject,
        String content, JavamailConfig javamailConfig)
        throws MessagingException {
    logger.debug("send : {}, {}", to, subject);

    try {
        Properties props = createSmtpProperties(javamailConfig);
        String username = javamailConfig.getUsername();
        String password = javamailConfig.getPassword();

        // 创建Session实例对象
        Session session = Session.getInstance(props, new SmtpAuthenticator(
                username, password));
        session.setDebug(false);

        // 创建MimeMessage实例对象
        MimeMessage message = new MimeMessage(session);
        // 设置邮件主题
        message.setSubject(subject);
        // 设置发送人
        message.setFrom(new InternetAddress(username));
        // 设置发送时间
        message.setSentDate(new Date());
        // 设置收件人
        message.setRecipients(RecipientType.TO, InternetAddress.parse(to));
        // 设置html内容为邮件正文，指定MIME类型为text/html类型，并指定字符编码为gbk
        message.setContent(content, "text/html;charset=gbk");

        // 保存并生成最终的邮件内容
        message.saveChanges();

        // 发送邮件
        Transport.send(message);
    } catch (Exception ex) {
        logger.error(ex.getMessage(), ex);
    }
}
 

/**
 * Structure of test message and content type:
 * <p>
 * Message (multipart/mixed)
 * \--> MultiPart (multipart/mixed)
 * \--> MimeBodyPart (message/rfc822)
 * \--> Message (text/plain)
 */
@Test
public void testForwardWithRfc822() throws MessagingException, IOException {
    greenMail.setUser("[email protected]", "pwd");
    final Session session = greenMail.getSmtp().createSession();

    // Message for forwarding
    Message msgToBeForwarded = GreenMailUtil.createTextEmail(
            "[email protected]", "[email protected]", "test newMessageWithForward", "forwarded mail content",
            greenMail.getSmtp().getServerSetup());


    // Create body part containing forwarded message
    MimeBodyPart messageBodyPart = new MimeBodyPart();
    messageBodyPart.setContent(msgToBeForwarded, "message/rfc822");

    // Add message body part to multi part
    Multipart multipart = new MimeMultipart();
    multipart.addBodyPart(messageBodyPart);

    // New main message, containing body part
    MimeMessage newMessageWithForward = new MimeMessage(session);
    newMessageWithForward.setRecipient(Message.RecipientType.TO, new InternetAddress("[email protected]"));
    newMessageWithForward.setSubject("Fwd: " + "test");
    newMessageWithForward.setFrom(new InternetAddress("[email protected]"));
    newMessageWithForward.setContent(multipart);   //Save changes in newMessageWithForward message
    newMessageWithForward.saveChanges();

    GreenMailUtil.sendMimeMessage(newMessageWithForward);

    final IMAPStore store = greenMail.getImap().createStore();
    store.connect("[email protected]", "pwd");
    try {
        Folder inboxFolder = store.getFolder("INBOX");
        inboxFolder.open(Folder.READ_WRITE);
        Message[] messages = inboxFolder.getMessages();
        MimeMessage msg = (MimeMessage) messages[0];
        assertTrue(msg.getContentType().startsWith("multipart/mixed"));
        Multipart multipartReceived = (Multipart) msg.getContent();
        assertTrue(multipartReceived.getContentType().startsWith("multipart/mixed"));
        MimeBodyPart mimeBodyPartReceived = (MimeBodyPart) multipartReceived.getBodyPart(0);
        assertTrue(mimeBodyPartReceived.getContentType().toLowerCase().startsWith("message/rfc822"));

        MimeMessage msgAttached = (MimeMessage) mimeBodyPartReceived.getContent();
        assertThat(msgAttached.getContentType().toLowerCase(), startsWith("text/plain"));
        assertArrayEquals(msgToBeForwarded.getRecipients(Message.RecipientType.TO), msgAttached.getRecipients(Message.RecipientType.TO));
        assertArrayEquals(msgToBeForwarded.getFrom(), msgAttached.getFrom());
        assertEquals(msgToBeForwarded.getSubject(), msgAttached.getSubject());
        assertEquals(msgToBeForwarded.getContent(), msgAttached.getContent());
    } finally {
        store.close();
    }
}
 

@PublicAtsApi
public Package sign( Package sourcePackage ) throws ActionException {

    try {
        if (Security.getProvider(BouncyCastleProvider.PROVIDER_NAME) == null) {
            Security.addProvider(new BouncyCastleProvider());
        }

        KeyStore ks = getKeystore();
        // TODO wrap exception with possible causes and add some hint
        PrivateKey privateKey = (PrivateKey) ks.getKey(aliasOrCN, certPassword.toCharArray());

        // Get whole certificate chain
        Certificate[] certArr = ks.getCertificateChain(aliasOrCN);
        // Pre 4.0.6 behavior was not to attach full cert. chain X509Certificate cer = (X509Certificate) ks.getCertificate(aliasOrCN);
        if (certArr.length >= 1) {
            LOG.debug("Found certificate of alias: " + aliasOrCN + ". Lenght of cert chain: " + certArr.length
                      + ", child cert:" + certArr[0].toString());
        }

        X509Certificate childCert = (X509Certificate) certArr[0];

        /* Create the SMIMESignedGenerator */
        ASN1EncodableVector attributes = new ASN1EncodableVector();
        attributes.add(new SMIMEEncryptionKeyPreferenceAttribute(
                                                                 new IssuerAndSerialNumber(new X500Name(childCert.getIssuerDN()
                                                                                                                 .getName()),
                                                                                           childCert.getSerialNumber())));

        SMIMECapabilityVector capabilities = new SMIMECapabilityVector();
        capabilities.addCapability(SMIMECapability.aES128_CBC);
        capabilities.addCapability(SMIMECapability.dES_EDE3_CBC);
        capabilities.addCapability(SMIMECapability.rC2_CBC, 128);
        capabilities.addCapability(SMIMECapability.dES_CBC);

        attributes.add(new SMIMECapabilitiesAttribute(capabilities));

        if (signatureAlgorithm == null) { // not specified explicitly 
            // TODO check defaults to be used
            signatureAlgorithm = SignatureAlgorithm.DSA.equals(privateKey.getAlgorithm())
                                                                                          ? "SHA1withDSA"
                                                                                          : "MD5withRSA";
        }

        SMIMESignedGenerator signer = new SMIMESignedGenerator();
        JcaSimpleSignerInfoGeneratorBuilder signerGeneratorBuilder = new JcaSimpleSignerInfoGeneratorBuilder();
        signerGeneratorBuilder.setProvider(BouncyCastleProvider.PROVIDER_NAME);
        signerGeneratorBuilder.setSignedAttributeGenerator(new AttributeTable(attributes));
        signer.addSignerInfoGenerator(signerGeneratorBuilder.build(signatureAlgorithm, privateKey,
                                                                   childCert));

        /* Add the list of certs to the generator */
        List<X509Certificate> certList = new ArrayList<X509Certificate>();
        for (int i = 0; i < certArr.length; i++) { // first add child cert, and CAs
            certList.add((X509Certificate) certArr[i]);
        }

        Store<?> certs = new JcaCertStore(certList);
        signer.addCertificates(certs);

        /* Sign the message */
        Session session = Session.getDefaultInstance(System.getProperties(), null);

        MimeMultipart mm = signer.generate(getMimeMessage(sourcePackage));
        MimeMessage signedMessage = new MimeMessage(session);

        /* Set all original MIME headers in the signed message */
        Enumeration<?> headers = getMimeMessage(sourcePackage).getAllHeaderLines();
        while (headers.hasMoreElements()) {
            signedMessage.addHeaderLine((String) headers.nextElement());
        }

        /* Set the content of the signed message */
        signedMessage.setContent(mm);
        signedMessage.saveChanges();

        return new MimePackage(signedMessage);
    } catch (Exception e) {
        throw new ActionException(EXCEPTION_WHILE_SIGNING, e);
    }
}
 

private static MimeMessage createMimeMessage(Session session, String sendMail, 
		String receiveMail, String password) throws Exception {

    MimeMessage message = new MimeMessage(session);


    message.setFrom(new InternetAddress(sendMail, "易购房", "UTF-8"));

 
    message.setRecipient(MimeMessage.RecipientType.TO, new InternetAddress(receiveMail, "亲爱的用户", "UTF-8"));

    // 4. Subject: 主题
    message.setSubject("找回密码", "UTF-8");

    // 5. Content: 内容
    message.setContent("您好，以下为您的密码，请及时修改~\n" + "密码：" + password, "text/html;charset=UTF-8");


    message.setSentDate(new Date());

    message.saveChanges();

    return message;
}
 

/**
 * 发送电子邮件
 * 
 * @param smtpHost
 *            发信主机
 * @param receiver
 *            邮件接收者
 * @param copy
 *            抄送列表
 * @param title
 *            邮件的标题
 * @param content
 *            邮件的内容
 * @param sender
 *            邮件发送者
 * @param user
 *            发送者邮箱用户名
 * @param pwd
 *            发送者邮箱密码
 * @throws Exception
 */
public static void sendEmail(String smtpHost, String receiver, String copy,
		String title, String content, String sender, String user, String pwd)
		throws Exception {
	Properties props = new Properties();
	props.put("mail.host", smtpHost);
	props.put("mail.transport.protocol", "smtp");
	// props.put("mail.smtp.host",smtpHost);//发信的主机，这里要把您的域名的SMTP指向正确的邮件服务器上，这里一般不要动！
	props.put("mail.smtp.auth", "true");
	Session s = Session.getDefaultInstance(props);
	s.setDebug(true);
	MimeMessage message = new MimeMessage(s);
	// 给消息对象设置发件人/收件人/主题/发信时间
	// 发件人的邮箱
	InternetAddress from = new InternetAddress(sender);
	message.setFrom(from);
	String[] receivers = receiver.split(",");
	InternetAddress[] to = new InternetAddress[receivers.length];
	for (int i = 0; i < receivers.length; i++) {
		to[i] = new InternetAddress(receivers[i]);
	}
	message.setRecipients(Message.RecipientType.TO, to);

	String[] copys = copy.split(",");
	InternetAddress[] cc = new InternetAddress[copys.length];
	for (int i = 0; i < copys.length; i++) {
		cc[i] = new InternetAddress(copys[i]);
	}
	message.setRecipients(Message.RecipientType.CC, cc);

	message.setSubject(title);
	message.setSentDate(new Date());
	// 给消息对象设置内容
	BodyPart mdp = new MimeBodyPart();// 新建一个存放信件内容的BodyPart对象
	mdp.setContent(content, "text/html;charset=gb2312");// 给BodyPart对象设置内容和格式/编码方式防止邮件出现乱码
	Multipart mm = new MimeMultipart();// 新建一个MimeMultipart对象用来存放BodyPart对
	// 象(事实上可以存放多个)
	mm.addBodyPart(mdp);// 将BodyPart加入到MimeMultipart对象中(可以加入多个BodyPart)
	message.setContent(mm);// 把mm作为消息对象的内容

	message.saveChanges();
	Transport transport = s.getTransport("smtp");
	transport.connect(smtpHost, user, pwd);// 设置发邮件的网关，发信的帐户和密码，这里修改为您自己用的
	transport.sendMessage(message, message.getAllRecipients());
	transport.close();
}
 

@Override
public void send(String senderAddress, String senderName, String recipient, String content) {
    if (StringUtils.isBlank(senderAddress)) {
        throw new FeatureNotAvailable("3PID Email identity: sender address is empty - " +
                "You must set a value for notifications to work");
    }

    if (StringUtils.isBlank(content)) {
        throw new InternalServerError("Notification content is empty");
    }

    try {
        InternetAddress sender = new InternetAddress(senderAddress, senderName);
        MimeMessage msg = new MimeMessage(session, IOUtils.toInputStream(content, StandardCharsets.UTF_8));

        // We must encode our headers ourselves as we have no guarantee that they were in the provided data.
        // This is required to support UTF-8 characters from user display names or room names in the subject header per example
        Enumeration<Header> headers = msg.getAllHeaders();
        while (headers.hasMoreElements()) {
            Header header = headers.nextElement();
            msg.setHeader(header.getName(), MimeUtility.encodeText(header.getValue()));
        }

        msg.setHeader("X-Mailer", MimeUtility.encodeText(Mxisd.Agent));
        msg.setSentDate(new Date());
        msg.setFrom(sender);
        msg.setRecipients(Message.RecipientType.TO, recipient);
        msg.saveChanges();

        log.info("Sending invite to {} via SMTP using {}:{}", recipient, cfg.getHost(), cfg.getPort());
        SMTPTransport transport = (SMTPTransport) session.getTransport("smtp");

        if (cfg.getTls() < 3) {
            transport.setStartTLS(cfg.getTls() > 0);
            transport.setRequireStartTLS(cfg.getTls() > 1);
        }

        log.info("Connecting to {}:{}", cfg.getHost(), cfg.getPort());
        if (StringUtils.isAllEmpty(cfg.getLogin(), cfg.getPassword())) {
            log.info("Not using SMTP authentication");
            transport.connect();
        } else {
            log.info("Using SMTP authentication");
            transport.connect(cfg.getLogin(), cfg.getPassword());
        }

        try {
            transport.sendMessage(msg, InternetAddress.parse(recipient));
            log.info("Invite to {} was sent", recipient);
        } finally {
            transport.close();
        }
    } catch (UnsupportedEncodingException | MessagingException e) {
        throw new RuntimeException("Unable to send e-mail invite to " + recipient, e);
    }
}
 

@ParameterizedTest
@ValueSource(strings = {PKCS1_PEM_FILE, PKCS8_PEM_FILE})
void testDKIMSignMessageAsObjectNotConverted(String pemFile)
        throws MessagingException, IOException, FailException {
    MimeMessage mm = new MimeMessage(Session
            .getDefaultInstance(new Properties()));
    mm.addFrom(new Address[]{new InternetAddress("[email protected]")});
    mm.addRecipient(RecipientType.TO, new InternetAddress("[email protected]"));
    mm.setContent("An 8bit encoded body with €uro symbol.",
            "text/plain; charset=iso-8859-15");
    mm.setHeader("Content-Transfer-Encoding", "8bit");
    mm.saveChanges();

    FAKE_MAIL_CONTEXT.getServerInfo();

    FakeMailetConfig mci = FakeMailetConfig.builder()
            .mailetName("Test")
            .mailetContext(FAKE_MAIL_CONTEXT)
            .setProperty(
                    "signatureTemplate",
                    "v=1; s=selector; d=example.com; h=from:to:received:received; a=rsa-sha256; bh=; b=;")
            .setProperty("privateKeyFilepath", pemFile)
            .build();

    Mail mail = FakeMail.builder()
        .name("test")
        .mimeMessage(mm)
        .build();

    Mailet mailet = new DKIMSign();
    mailet.init(mci);

    Mailet m7bit = new ConvertTo7Bit();
    m7bit.init(mci);
    // m7bit.service(mail);

    mailet.service(mail);

    m7bit.service(mail);

    ByteArrayOutputStream rawMessage = new ByteArrayOutputStream();
    mail.getMessage().writeTo(rawMessage);

    MockPublicKeyRecordRetriever mockPublicKeyRecordRetriever = new MockPublicKeyRecordRetriever(
            "v=DKIM1; k=rsa; p=MIGfMA0GCSqGSIb3DQEBAQUAA4GNADCBiQKBgQDYDaYKXzwVYwqWbLhmuJ66aTAN8wmDR+rfHE8HfnkSOax0oIoTM5zquZrTLo30870YMfYzxwfB6j/Nz3QdwrUD/t0YMYJiUKyWJnCKfZXHJBJ+yfRHr7oW+UW3cVo9CG2bBfIxsInwYe175g9UjyntJpWueqdEIo1c2bhv9Mp66QIDAQAB;",
            "selector", "example.com");
    try {
        verify(rawMessage, mockPublicKeyRecordRetriever);
        fail("Expected PermFail");
    } catch (PermFailException e) {
        // do nothing
    }
}
 

/**
 * 
 * @param targetMail  发送至的账号
 * @param title  发送的标题
 * @param content  发送的内容
 */
public void sendMail(String targetMail,String title,String content) {  
  try {  
  properties = new Properties();  
  //设置邮件服务器  
  properties.put("mail.smtp.host", "smtp.163.com");  
  //验证  
  properties.put("mail.smtp.auth", "true");  
  //根据属性新建一个邮件会话  
  mailSession = Session.getInstance(properties,  
  new Authenticator() {  
  public PasswordAuthentication getPasswordAuthentication() {  
  return new PasswordAuthentication("[email protected]",  
  "cccccc");  
  }  
  });  
  mailSession.setDebug(true);  
  //建立消息对象  
  mailMessage = new MimeMessage(mailSession);  
  //发件人  
  mailMessage.setFrom(new InternetAddress("[email protected]"));  
  //收件人  
  mailMessage.setRecipient(MimeMessage.RecipientType.TO,  
  new InternetAddress(targetMail));  
  //主题  
  mailMessage.setSubject(title);  
  //内容  
  mailMessage.setText(content);  
  //发信时间  
  mailMessage.setSentDate(new Date());  
  //存储信息  
  mailMessage.saveChanges();  
  //  
  trans = mailSession.getTransport("smtp");  
  //发送  
  trans.send(mailMessage);  
  } catch (Exception e) {  
	  new File().log("邮件发送失败异常捕获:"+e.getMessage());
  e.printStackTrace();  
  } finally {  
  }  
  }
 

/**
 * Service does the hard work, and signs
 *
 * @param mail the mail to sign
 * @throws MessagingException if a problem arises signing the mail
 */
@Override
public void service(Mail mail) throws MessagingException {
    
    try {
        if (!isOkToSign(mail)) {
            return;
        }
        
        MimeBodyPart wrapperBodyPart = getWrapperBodyPart(mail);
        
        MimeMessage originalMessage = mail.getMessage();
        
        // do it
        MimeMultipart signedMimeMultipart;
        if (wrapperBodyPart != null) {
            signedMimeMultipart = getKeyHolder().generate(wrapperBodyPart);
        } else {
            signedMimeMultipart = getKeyHolder().generate(originalMessage);
        }
        
        MimeMessage newMessage = new MimeMessage(Session.getDefaultInstance(System.getProperties(),
        null));
        Enumeration<String> headerEnum = originalMessage.getAllHeaderLines();
        while (headerEnum.hasMoreElements()) {
            newMessage.addHeaderLine(headerEnum.nextElement());
        }
        
        newMessage.setSender(new InternetAddress(getKeyHolder().getSignerAddress(), getSignerName()));
  
        if (isRebuildFrom()) {
            // builds a new "mixed" "From:" header
            InternetAddress modifiedFromIA = new InternetAddress(getKeyHolder().getSignerAddress(), mail.getMaybeSender().asString());
            newMessage.setFrom(modifiedFromIA);
            
            // if the original "ReplyTo:" header is missing sets it to the original "From:" header
            newMessage.setReplyTo(originalMessage.getReplyTo());
        }
        
        newMessage.setContent(signedMimeMultipart, signedMimeMultipart.getContentType());
        String messageId = originalMessage.getMessageID();
        newMessage.saveChanges();
        if (messageId != null) {
            newMessage.setHeader(RFC2822Headers.MESSAGE_ID, messageId);
        }
        
        mail.setMessage(newMessage);
        
        // marks this mail as server-signed
        mail.setAttribute(new Attribute(SMIMEAttributeNames.SMIME_SIGNING_MAILET, AttributeValue.of(this.getClass().getName())));
        // it is valid for us by definition (signed here by us)
        mail.setAttribute(new Attribute(SMIMEAttributeNames.SMIME_SIGNATURE_VALIDITY, AttributeValue.of("valid")));
        
        // saves the trusted server signer address
        // warning: should be same as the mail address in the certificate, but it is not guaranteed
        mail.setAttribute(new Attribute(SMIMEAttributeNames.SMIME_SIGNER_ADDRESS, AttributeValue.of(getKeyHolder().getSignerAddress())));
        
        if (isDebug()) {
            LOGGER.debug("Message signed, reverse-path: {}, Id: {}", mail.getMaybeSender().asString(), messageId);
        }
        
    } catch (MessagingException me) {
        LOGGER.error("MessagingException found - could not sign!", me);
        throw me;
    } catch (Exception e) {
        LOGGER.error("Exception found", e);
        throw new MessagingException("Exception thrown - could not sign!", e);
    }
    
}
 

public void convertTo7Bit(MimeMessage mimeMessage) throws MessagingException, IOException {
    convertPart(mimeMessage);
    mimeMessage.saveChanges();
}