Develop Reference

Outlook and office 365 don't recognize ICS file

I'm developping a ics sender functionnality.
But i have some trouble with office 365 and outlook.
When i sent the ics file to google mail, i don't have any problem.
My event appear in the gmail.
But when i send to outlook or office 365, my appointment didn't appear but it was in the email attachment ( ATT00001.ics).
This is the code send the mail
private void generateIcal(MimeMessage message) throws MessagingException, IOException {
message.addHeaderLine("method=REQUEST");
message.addHeaderLine("charset=UTF-8");
message.addHeaderLine("component=VEVENT");
message.setFrom(new InternetAddress(from));
message.setSubject(subj,"UTF-8");
StringBuffer sb = new StringBuffer();
// Create the message part
BodyPart messageBodyPart = new MimeBodyPart();
// Fill the message
messageBodyPart.setHeader("Content-Class", "urn:content-classes:calendarmessage");
messageBodyPart.setHeader("Content-ID", "calendar_message");
messageBodyPart.setDataHandler(new DataHandler(
new ByteArrayDataSource(txt, "text/calendar;charset=utf-8")));//very important
// Create a Multipart
Multipart multipart = new MimeMultipart();
// Add part one
multipart.addBodyPart(messageBodyPart);
// Put parts in message
message.setContent(multipart);
}
And this generate the ics file
BEGIN:VCALENDAR
VERSION:2.0
PRODID:-//TELELANGUE//NONSGML v1.0//EN
BEGIN:VEVENT
DTSTART:20180714T170000Z
DTEND:20180715T035900Z
SUMMARY:Fête à la Bastille
END:VEVENT
END:VCALENDAR

Thanks for your reply
Finally, I found the solution.
Looks like, we need to set "method" and "name" parameters into the BodyPart.
MessageBodyPart.setDataHandler(new DataHandler(
new ByteArrayDataSource(buffer.toString(), "text/calendar;method=REQUEST;name=\"meeting.ics\"")));

1) Parse the ics. file and make it an event in Inbox so that you can read the event information without opening the attachment.
2) Add interactivity so that you can accept/decline the invite directly from Inbox without even opening the ics file. (This is what Gmail has now).
For more information, please see the link below:
incoming calendar invites from outlook are blank
.ics files not showing up in the Outlook.com Inbox?

Javax.mail or java email - how to open email without direct sending

I'm trying to figure it out of how to open an email using javax.mail. My goal is to provide a feature where a user clicks on a button and a default email will open with an attachment. So far, I'm using javax.mail and what it does is just sending the email right when the button is click. Is there a way to just open the email without direct sending? If so, how? I'm using Java 8.
I can't use the 'mailto:' because I need to attach a png file when a user opens an email. Also I'm not sure if I should use ProcessBuilder to open outlook because every user's machine will have a different userName within the C Drive or I'm not sure how to use that.
Here's my code just in case if you need it
String result;
String to = "....gov";
String from = "....gov";
String host = "....gov";
Properties properties = System.getProperties();
properties.setProperty("mail.smtp.host", host);
Session mailSession = Session.getDefaultInstance(properties);
try{
MimeMessage message = new MimeMessage(mailSession);
message.setFrom(new InternetAddress(emailFrom));
message.addRecipient(Message.RecipientType.TO,new InternetAddress(emailTo));
message.setSubject("meh!");
BodyPart messageBodyPart = new MimeBodyPart();
messageBodyPart.setText("text body mehmehmehmeh");
// Create a multipar message
Multipart multipart = new MimeMultipart();
// Set text message part
multipart.addBodyPart(messageBodyPart);
// Part two is attachment
messageBodyPart = new MimeBodyPart();
String filename = "testing.png";
DataSource source = new FileDataSource(filename);
String imageString = toDataURL.substring("data:image/png;base64," .length());
byte[] contentdata = imageString.getBytes();
ByteArrayDataSource ds = new ByteArrayDataSource(contentdata, "image/png");
messageBodyPart.setDataHandler(new DataHandler(ds));
messageBodyPart.setFileName(filename);
multipart.addBodyPart(messageBodyPart); //
// Send the complete message parts
message.setContent(multipart);
Transport.send(message);
result = "Sent message successfully....";
}catch (MessagingException mex) {
mex.printStackTrace();
result = "Error: unable to send message....";
}

Is there a way to just open the email without direct sending? If so, how?
Don't call Transport.send. Then follow the steps in this answer. and start with msg.saveChanges(). There is an X-Unsent header in that answer that can be used to toggle some outlook features.
Also I'm not sure if I should use ProcessBuilder to open outlook because every user's machine will have a different userName within the C Drive or I'm not sure how to use that.
You use File.createTempFile​ as this will account for user names. If you need to save in a different location you can read from System.getProperty​ or if you are only targeting Windows machines you can read from System.getenv. To list all the environment vars you can type set in the command window.

Include Image in an email without attachments using java

I want to add an image to an email along with some text without having to attach the image in the email. Would this be possible ?
I have managed to do the following so far but it is sent with an attachment and also the image in the mail. I want it without an attachment but as a part of the mail
`Message message = new MimeMessage(session);
message.setFrom(new InternetAddress(username));
message.setRecipients(Message.RecipientType.TO,
InternetAddress.parse(emailID));
message.setSubject("Password Reset");
Multipart multipart = new MimeMultipart("related");
BodyPart htmlPart = new MimeBodyPart();
htmlPart.setContent("<html><body>Hi<img src=\"cid:the-img-1\"/></body></html>", "text/html");
multipart.addBodyPart(htmlPart);
BodyPart imgPart=new MimeBodyPart();
// Loading the image
DataSource ds=new FileDataSource("C:\\Users\\XYZ\\Desktop\\images.jpg");
imgPart.setDataHandler(new DataHandler(ds));
//Setting the header
imgPart.setHeader("Content-ID","the-img-1");
multipart.addBodyPart(imgPart);
// attaching the multi-part to the message
message.setContent(multipart);
Transport.send(message);`

You need to construct a multipart/related message.

You will be need to construct an html based e-mail for that purpose.
There are plenty of examples that you can get on google for that.
One example is look at here.
Note that image you want to send should be accessible over http to recipient. May be you can upload it on google drive or some image server

Getting java.lang.VerifyError while sending mail using javax.mail

I am trying to send a mail with attachment using javax.mail functionality, below is my code:
// create the message part
MimeBodyPart messageBodyPart = new MimeBodyPart();
// fill message
messageBodyPart.setText(strmessage);
Multipart multipart = new MimeMultipart();
multipart.addBodyPart(messageBodyPart);
AdcsipLogger.adcsipLog("begin exportFile...........");
ExportFile exportFile = buildQuestionnaireReport(questionnaire);
// Part two is attachment
messageBodyPart = new MimeBodyPart();
DataSource source = new ExportFileDataSource(exportFile);
messageBodyPart.setDataHandler(new DataHandler(source));
messageBodyPart.setFileName(questionnaire.getName() + ".pdf");
multipart.addBodyPart(messageBodyPart);
// Put parts in message
message.setContent(multipart);
// Send the message
Transport.send(message);
I am getting an exception at line:
messageBodyPart.setDataHandler(new DataHandler(source));
Below is the extract from stacktrace:
[10/30/13 14:44:38:089 CET] 00000062 ServletWrappe E com.ibm.ws.webcontainer.servlet.ServletWrapper service SRVE0068E: Uncaught exception created in one of the service methods of the servlet QuestionnaireControl in application A430-CADCSIP-V8.0_Run4. Exception created : java.lang.VerifyError: javax/mail/internet/MimeBodyPart.setDataHandler(Ljavax/activation/DataHandler;)V
Please help me.
Thanks.

You're running in WebSphere, right?
Do you have the JavaMail jar file included in your application? If so, it may be conflicting with the version included in WebSphere.

Adding image to email via Java mail

Here is my code:
MimeMessage mail = new MimeMessage(session);
mail.setFrom(from);
MimeMultipart multipart = new MimeMultipart("related");
MimeBodyPart htmlPart = new MimeBodyPart();
htmlPart.setContent(bodyText, "text/html");
multipart.addBodyPart(htmlPart);
MimeBodyPart imgPart=new MimeBodyPart();
String path = "/ivr/imagelogos/accenture.jpg";
DataSource ds=new FileDataSource(path);
imgPart.setDataHandler(new DataHandler(ds));
imgPart.setHeader("Content-ID","the-img-1");
multipart.addBodyPart(imgPart);
mail.setContent(multipart);
mail.setSentDate(new Date());
mail.setHeader("X-Mailer", "ALS Notifier Build 1.0.0.10");
// send the message
Transport.send(mail);
The code is being ran on a unix box - image path is based on unix file paths.
After running the code I receive this error:
IOException while sending message
javax.mail.MessagingException: IOException while sending message;
nested exception is:
java.io.FileNotFoundException: /ivr/imagelogos/accenture.jpg (No such file or directory)
at com.sun.mail.smtp.SMTPTransport.sendMessage(SMTPTransport.java:676)

Sounds like the /ivr/imagelogos/accenture.jpg file doesn't exist. Are you sure that's the right path? Maybe it's supposed to be relative to some other path? If it does exist, does the user running the Java app have read permissions on it?

Img src= is the most efficient way to insert just a few images, otherwise you may find it useful/helpful to define an array for multiple images.