I have a simple web application where different users can log into it. One of the important feature is user can access a document and send email of it's content to an outsider like third party. Below is just how the email looks like to give an idea:
It's pretty self explanatory and I can send to multiple user if I want like abc#example.com,efg#hotmail.com,... in the field box shown.With all this, I am using Java Mail API to make it work and after hitting the send button,it sends directly to the recipient.No issue at all.
Now, I want to modify this by doing this email feature as a service.What this means is when I send the email,the content and info filled in will be stored in a table in MYSQL and the service(running in background) will pick up from the table and do the sending.
This is my function:
public void sendEmail(String recipient, String subject, String content,
String host, String port, final String senderaddress,
final String password) {
try {
System.out.println("Please Wait, sending email...");
/*Setup mail server */
Properties props = new Properties();
props.put("mail.smtp.host", host); //SMTP Host
props.put("mail.smtp.port", port); //TLS Port
props.put("mail.smtp.auth", "true"); //enable authentication
props.put("mail.smtp.starttls.enable", "true"); //enable STARTTLS
//create Authenticator object to pass in Session.getInstance argument
Authenticator auth = new Authenticator() {
//override the getPasswordAuthentication method
protected PasswordAuthentication getPasswordAuthentication() {
return new PasswordAuthentication(senderaddress, password);
}
};
Session session = Session.getInstance(props, auth);
session.setDebug(true);
// Define message
MimeMessage message = new MimeMessage(session);
// Set From: header field of the header.
message.setFrom(new InternetAddress(senderaddress));
message.addRecipients(Message.RecipientType.TO,
InternetAddress.parse(recipient));
// Set Subject: header field
message.setSubject(subject);
// Now set the actual message
message.setText(content);
try {
Transport.send(message);
} catch (AddressException addressException) {
addressException.printStackTrace();
}
} catch (Exception e) {
System.out.println(e.getMessage());
}
}
Can this be done in the way I want because I am unsure how to make it work?
1 ) After hitting Sending mail button from UI, You need to call a method for saving data like recipient, subject, content in DB
2)Write an email sender Service which retrieves non_delivered / pending mail from DB table and send it through Java Mail API
3)Scheduled email sender service with the help of ScheduledExecutorService
Related
I am trying to send an email in a java application calling this method:
public static void sendEmail() {
// Create object of Property file
Properties props = new Properties();
// this will set host of server- you can change based on your requirement
props.put("mail.smtp.host", "smtp.office365.com");
// set the port of socket factory
//props.put("mail.smtp.socketFactory.port", "587");
// set socket factory
//props.put("mail.smtp.socketFactory.class","javax.net.ssl.SSLSocketFactory");
// set the authentication to true
props.put("mail.smtp.auth", "true");
// set the port of SMTP server
props.put("mail.smtp.port", "587");
// This will handle the complete authentication
Session session = Session.getDefaultInstance(props,
new javax.mail.Authenticator() {
protected PasswordAuthentication getPasswordAuthentication() {
return new PasswordAuthentication("xx#mail.com", "xx");
}
});
try {
// Create object of MimeMessage class
Message message = new MimeMessage(session);
// Set the from address
message.setFrom(new InternetAddress("xx#mail.com"));
// Set the recipient address
message.setRecipients(Message.RecipientType.TO,InternetAddress.parse("yy#mail.com"));
// Add the subject link
message.setSubject("Testing Subject");
// Create object to add multimedia type content
BodyPart messageBodyPart1 = new MimeBodyPart();
// Set the body of email
messageBodyPart1.setText("This is message body");
// Create object of MimeMultipart class
Multipart multipart = new MimeMultipart();
// add body part 2
multipart.addBodyPart(messageBodyPart1);
// set the content
message.setContent(multipart);
// finally send the email
Transport.send(message);
System.out.println("=====Email Sent=====");
} catch (MessagingException e) {
throw new RuntimeException(e);
}
}
but for some reason when the debug hits Transport.send(), I got this exception:
com.sun.mail.smtp.SMTPSendFailedException: 530 5.7.57 SMTP; Client was not authenticated to send anonymous mail during MAIL FROM [DB6PR0802CA0037.eurprd08.prod.outlook.com]
why is this happening even though I used the Authenticator()?
If you connect via port 587 you initially start a plain connection where you have to start TLS by explicitly sending the STARTTLS-command. You have to tell JavaMail to do that, otherwise it will try to proceed unsecured. The SMTP-server doesn't send any authentication-mechanism-informations unless the TLS-connection is established, so JavaMail is assuming that no authentication is needed and tries to send the mail without.
Add the following entry to the properties:
props.put("mail.smtp.starttls.enable", "true");
WIth that JavaMail should try to switch to TLS before trying to authenticate.
If that fails, you need to enable debugging by setting the property
props.put("mail.debug", "true");
and post the output here.
public static void sendEmail(String msgHeader, String msg, String emailId, String emailFrom) {
Properties props = new Properties();
props.put("mail.smtp.auth", "false");
props.put("mail.debug", "true");
props.put("mail.smtp.starttls.enable", "true");
props.put("mail.smtp.host", mailServer);
props.put("mail.smtp.port", port#);
props.put("mail.smtp.auth.mechanisms", "NTLM");
props.put("mail.smtp.auth.ntlm.domain", domainName);
Session session = Session.getDefaultInstance(props, null);
try {
MimeMessage message = new MimeMessage(session);
message.setFrom(new InternetAddress(emailFrom));
to = emailId;
message.setRecipients(Message.RecipientType.TO, InternetAddress.parse(to));
message.setSubject(msgHeader);
message.setText(msg, "utf-8", "html");
message.saveChanges();
session.getDebug();
Transport.send(message);
// Copy message to "Sent Items" folder as read
Store store = session.getStore("ntlm");
store.connect(mailServer, emailFrom, pwd);
Folder folder = store.getFolder("Sent Items");
folder.open(Folder.READ_WRITE);
message.setFlag(Flag.SEEN, true);
folder.appendMessages(new Message[] {message});
store.close();
} catch (Exception ex) {
logger.error("Error occured while sending Email !", ex);
}
}
When I try to execute the code above, i am able to send out the emails. the issue is with saving the email. I get an error (NoSuchProviderException) at the line
Store store = session.getStore("ntlm");
I have a few questions on this:-
The email sending part works without password verification with ntlm. Is it possible to save the sent email into the sent items folder without password verification. If yes then how?
session.getStore doesnt work when i use
a. smtp - exception (Invalid provider)
b. ntlm - exception (NoSuchProviderException)
what should i use here.
Thanks in advance for your help.
"ntlm" is not a type of Store, it's an authentication mechanism. The store types supported by JavaMail are "imap" and "pop3". You almost certainly want "imap". Just like sending, you're going to need to supply your username and password when connecting to your imap server.
Also, upgrade to the current version of JavaMail if possible.
I try to send email with Intent. I wrote code witch can send email
send.setOnClickListener(new OnClickListener() {
#Override
public void onClick(View v) {
Intent email = new Intent(Intent.ACTION_SEND);
email.putExtra(Intent.EXTRA_EMAIL, new String[] { Email });
email.putExtra(Intent.EXTRA_SUBJECT,"subject");
email.putExtra(Intent.EXTRA_TEXT, "text1");
email.setType("message/rfc822");
startActivity(Intent.createChooser(email, "Choose an Email client :"));
}
});
I can send email, but when I choose email client then I can change subject text and extra text. How I can write code to use would not can change subject and extra texts when user would choose email client?
The only way to avoid the user from changing email text is to issue the mail
programmatically, i.e. with no UI. It is usually done in Android by using the JavaMail API.
Send Email via JavaMail
First add lines below to your sender class:
static {
Security.addProvider(new JSSEProvider());
}
JSSEP stands for Java Secure Socket Extension, which is the protocol used for
Gmail authentication that we will later on use.
You can grab a working sample of JSSEProvider at:
https://android.googlesource.com/platform/libcore/+/jb-mr2-release/luni/src/main/java/org/apache/harmony/xnet/provider/jsse/JSSEProvider.java
Create a sender class :
public class EmailSender extends javax.mail.Authenticator {
void sendMail(username, password, ) {
...
}
}
We now move to sendMail() method implementation:
Start by setting properties for transmission via Gmail:
Properties props = new Properties();
props.setProperty("mail.transport.protocol", "smtp");
props.setProperty("mail.host", "smtp.gmail.com"); // <--------- via Gmail
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);
And follow by sending the mail:
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.setRecipient(Message.RecipientType.TO, new InternetAddress(recipients));
Transport.send(message);
ByteArrayDataSource is a standard implementation. You can grab it from
http://commons.apache.org/proper/commons-email/apidocs/src-html/org/apache/commons/mail/ByteArrayDataSource.html
You wil also need to add the method below, returning the PasswordAuthentication, to your class:
#Override
protected PasswordAuthentication getPasswordAuthentication() {
return new PasswordAuthentication(user, password);
}
Good luck.
If you really need to lock in the subject and message body, but let the user choose the email recipients (the To list), you'll have to provide them a dialog to enter in email recipient, and then send the email in an automated fashion by using something like Apache Commons EMail
As a user, I'd be pretty wary of having an email sent from my phone where I can't see the subject line and body text. You may want to just use the method you have now wehre they can edit the text, or at least show them what you're sending.
My requirement is to send E-Mail Alerts to various customers for our client for which, we're planning to use JavaMail API. However, once mail is sent, we need to update status in DB as Sent/Delivered/Failure depending on the status of the mail. Please tell me how do we get Delivery Notification for the mail reaching the Mail Server of the Receiver. It's not necessary to ensure whether the person has read the mail or not, however, it will be great if we'll be able to know that. The mandatory thing to check is for delivery. How can we get the status. What I read was that using 'SMTPMessage' we can get the status, however, I couldn't find a code sample for how to read the Notification. I am putting my code which is very sample of what I have done till now. Please let me know how I can achieve the thing which we are trying to fulfill.
public class MailSender {
private int port = 25;
private String host = "testmailsrvr";
private String from = "test#test.com";
private boolean auth = true;
private String username = "test";
private String password = "test#123";
private Protocol protocol = Protocol.SMTP;
private boolean debug = true;
public void sendEmail(String strMailID, String strSubject, String strBody) throws MessagingException{
Properties props = new Properties();
props.put("mail.smtp.host", host);
props.put("mail.smtp.port", port);
switch (protocol) {
case SMTPS:
props.put("mail.smtp.ssl.enable", true);
break;
case TLS:
props.put("mail.smtp.starttls.enable", true);
break;
case SMTP:
props.put("mail.smtp.ssl.enable", false);
break;
}
Authenticator authenticator = null;
if (auth) {
props.put("mail.smtp.auth", true);
authenticator = new Authenticator() {
private PasswordAuthentication pa = new PasswordAuthentication(username, password);
#Override
public PasswordAuthentication getPasswordAuthentication() {
return pa;
}
};
}
Session session = Session.getInstance(props, authenticator);
session.setDebug(debug);
MimeMessage message = new MimeMessage(session);
message.setFrom(new InternetAddress(from));
InternetAddress[] toAddress = {new InternetAddress(strMailID)};
message.setRecipients(Message.RecipientType.TO, toAddress);
message.setSubject(strSubject);
message.setSentDate(new Date());
message.setText(strBody);
Transport.send(message);
}
}
You'll want to read these JavaMail FAQ entries:
If I send a message to a bad address, why don't I get a SendFailedException or TransportEvent indicating that the address is bad?
When a message can't be delivered, a failure message is returned. How can I detect these "bounced" messages?
Then read the javadocs for the com.sun.mail.smtp and com.sun.mail.dsn packages to learn about Delivery Status Notifications.
You will have to approach the issue differently. The Transport.send() method will throw a SendFailedException if it runs into problems sending to any of the recipients. The exception will give you information on which recipient addresses failed. You should catch that exception, get the failing addresses and record them.
You might want to look into http://www.ultrasmtp.com. This service will send a notice back to the recipient upon the message being accepted, deferred, or refused by the receiving mail server. There is also an option to setup alerts for opened messages.
I am sending email using
public void sendEmail(String fromEmailAddr, String toEmailAddr,String subject, String emailBody) {
String host = "xxx";
final String user = "user";
final String password = "password";
// Get system properties
Properties properties = new Properties();
// Setup mail server
properties.put("mail.smtp.host", host);
properties.put("mail.smtp.port", "25");
// Get the default Session object.
Session session = Session.getDefaultInstance(properties, null);
try{
// Create a default MimeMessage object.
MimeMessage message = new MimeMessage(session);
// Set From: header field of the header.
message.setFrom(new InternetAddress(fromEmailAddr));
// Set To: header field of the header.
message.addRecipient(Message.RecipientType.TO, new InternetAddress(toEmailAddr));
// Set Subject: header field
message.setSubject(subject);
// Now set the actual message
message.setText(emailBody);
// Send message
Transport.send(message);
System.out.println("Sent message successfully....");
}catch (MessagingException mex) {
mex.printStackTrace();
}
}
When i try to send email using above code then it comes to message Sent message successfully.... but i got no email. On the other hand if i use authentication then i got the email
properties.put("mail.smtp.host", host);
properties.put("mail.smtp.auth", "true");
Session session = Session.getDefaultInstance(properties,
new javax.mail.Authenticator() {
protected PasswordAuthentication getPasswordAuthentication() {
return new PasswordAuthentication(user,password);
}
});
Why ? Is it necessary to provide userName and password for host ? Can i send email by just specifying host, no username and password provided ?
Thanks
I guess the port number might be the issue.
Try changing properties.put("mail.smtp.port", "25");
to properties.put("mail.smtp.port", "587");.
Further you can refer this.
It depends on the mail server you're using.
For example, some mail servers will let you send mail to anyone in the same company without authentication, but authentication is needed to send mail outside of the company. In the latter case, if you send the mail without authenticating, the mail server may accept the message and return a "mailer-daemon" failure message, or might just throw the message away.
Also, see this list of common JavaMail mistakes.