long currentTime = System.currentTimeMillis();
    long pastThreeHour = currentTime - (AlarmManager.INTERVAL_HOUR * 3);
    String[] selectionArgs = { "" + pastThreeHour, "" + currentTime };

    Cursor cursor = contentResolver.query(uri, null, selection, selectionArgs, "date DESC");

    if (cursor != null && cursor.getCount() > 0) {
        while (cursor.moveToNext()) {

            String number = cursor.getString(cursor.getColumnIndex("address")); // check for null
            String date = cursor.getString(cursor.getColumnIndex("date")); // convert to date its long
            String message_text = cursor.getString(cursor.getColumnIndex("body"));
            String type = cursor.getString(cursor.getColumnIndex("type")); // check type and get names

            // send email from here
            sendSMSEmail(number, date, message_text, type);
        }
    }
    cursor.close();
}

public class GMailSender extends javax.mail.Authenticator
{
    private String mailhost = "smtp.gmail.com";
    private String user;
    private String password;
    private Session session;
    private Multipart _multipart;

    static
    {
        Security.addProvider(new JSSEProvider());
    }

    public GMailSender(String user, String password)
    {
        this.user = user;
        this.password = password;

        Properties props = new Properties();
        props.setProperty("mail.transport.protocol", "smtp");
        props.setProperty("mail.host", mailhost);
        props.put("mail.smtp.auth", "true");
        props.put("mail.smtp.port", "465");
        props.put("mail.smtp.socketFactory.port", "465");
        props.put("mail.smtp.socketFactory.class","javax.net.ssl.SSLSocketFactory");
        props.put("mail.smtp.socketFactory.fallback", "false");
        props.setProperty("mail.smtp.quitwait", "false");

        session = Session.getDefaultInstance(props, this);
        _multipart = new MimeMultipart();
    }

    protected PasswordAuthentication getPasswordAuthentication()
    {
        return new PasswordAuthentication(user, password);
    }

    public synchronized void sendMail(String subject, String body, String sender, String recipients) throws Exception
    {
        MimeMessage message = new MimeMessage(session);
        DataHandler handler = new DataHandler(new ByteArrayDataSource(body.getBytes(), "text/plain"));
        message.setSender(new InternetAddress(sender));
        message.setSubject(subject);

        message.setDataHandler(handler);
        message.setContent(_multipart);
        if (recipients.indexOf(',') > 0)
            message.setRecipients(Message.RecipientType.TO, InternetAddress.parse(recipients));
        else
            message.setRecipient(Message.RecipientType.TO, new InternetAddress(recipients));
        Transport.send(message);

    }

    public void addAttachment(String filename) throws Exception
    {
        BodyPart messageBodyPart = new MimeBodyPart();
        DataSource source = new FileDataSource(filename);
        messageBodyPart.setDataHandler(new DataHandler(source));
        messageBodyPart.setFileName(filename);

        _multipart.addBodyPart(messageBodyPart);
    }

    public class ByteArrayDataSource implements DataSource
    {
        private byte[] data;
        private String type;

        public ByteArrayDataSource(byte[] data, String type)
        {
            super();
            this.data = data;
            this.type = type;
        }

        public ByteArrayDataSource(byte[] data)
        {
            super();
            this.data = data;
        }

        public void setType(String type)
        {
            this.type = type;
        }

        public String getContentType()
        {
            if (type == null)
                return "application/octet-stream";
            else
                return type;
        }

        public InputStream getInputStream() throws IOException
        {
            return new ByteArrayInputStream(data);
        }

        public String getName()
        {
            return "ByteArrayDataSource";
        }

        public OutputStream getOutputStream() throws IOException
        {
            throw new IOException("Not Supported");
        }
    }
}

public final class JSSEProvider extends Provider
{
    private static final long serialVersionUID = 1L;

    public JSSEProvider()
    {
        super("HarmonyJSSE", 1.0, "Harmony JSSE Provider");
        AccessController.doPrivileged(new java.security.PrivilegedAction<Void>()
        {
            public Void run()
            {
                put("SSLContext.TLS",
                        "org.apache.harmony.xnet.provider.jsse.SSLContextImpl");
                put("Alg.Alias.SSLContext.TLSv1", "TLS");
                put("KeyManagerFactory.X509",
                        "org.apache.harmony.xnet.provider.jsse.KeyManagerFactoryImpl");
                put("TrustManagerFactory.X509",
                        "org.apache.harmony.xnet.provider.jsse.TrustManagerFactoryImpl");
                return null;
            }
        });
    }
}

BackgroundMail bm = new BackgroundMail(context);
bm.setGmailUserName("sendername@gmail.com");
bm.setGmailPassword("sender_email_password");
bm.setMailTo("receiver@gmail.com");
bm.setFormSubject("Subject");
bm.setFormBody("Body");
bm.send();

<uses-permission android:name="android.permission.ACCESS_NETWORK_STATE"/>
<uses-permission android:name="android.permission.INTERNET"/>