Loading, Viewing and Parsing MSG file

This topic explains how to load a Microsoft Outlook Message file (*.msg). The MapiMessage class is used to load MSG files and provides several static loading functions for different scenarios. The following code snippet shows you how to load MSG files from a file or from a stream.

Loading MSG Files

The following code snippet shows you how to load MSG files.

// For complete examples and data files, please go to https://github.com/aspose-email/Aspose.Email-for-Java
// The path to the File directory.
String dataDir = RunExamples.getDataDir_Outlook();

// Create an instance of MapiMessage from file
MapiMessage msg = MapiMessage.fromFile(dataDir + "message.msg");

// Get subject
System.out.println("Subject:" + msg.getSubject());

// Get from address
System.out.println("From:" + msg.getSenderEmailAddress());

// Get body
System.out.println("Body" + msg.getBody());

// Get recipients information
System.out.println("Recipient: " + msg.getRecipients());

// Get attachments
for (MapiAttachment att : msg.getAttachments())
{
    System.out.println("Attachment Name: " + att.getFileName());
    System.out.println("Attachment Display Name: " + att.getDisplayName());
}

The following code example shows how to use MailMessage to load a message in MSG format.

MailMessage eml = MailMessage.load("message.msg");

It should be noted that a resulting message is converted to EML format, including embedded message attachments. Don’t use this loading method if you want to preserve some specific msg format properties of the original message.

To preserve the original format of embedded message attachments, use the MsgLoadOptions.PreserveEmbeddedMessageFormat property.

MsgLoadOptions msgLoadOptions = new MsgLoadOptions();
msgLoadOptions.setPreserveEmbeddedMessageFormat(true);
MailMessage msg = MailMessage.load(stream, msgLoadOptions);

Loading From Stream

The following code snippet shows you how to load a file from a stream.

// For complete examples and data files, please go to https://github.com/aspose-email/Aspose.Email-for-Java
// Create an instance of MapiMessage from file
try (FileInputStream stream = new FileInputStream(dataDir + "message.msg"))
{
    // Create an instance of MapiMessage from file
    MapiMessage msg = MapiMessage.fromStream(stream);

    // Get subject
    System.out.println("Subject:" + msg.getSubject());

    // Get from address
    System.out.println("From:" + msg.getSenderEmailAddress());

    // Get body
    System.out.println("Body" + msg.getBody());

}

Converting EML to MSG preserving embedded EML format

EML files can be loaded into MapiMessage class by instantiating a MailMessage object and passing it to MapiMessage.fromMailMessage method. If the EML file contains embedded EML files, use MapiConversionOptions.setPreserveEmbeddedMessageFormat to retain the format of embedded EML files. The below code snippet shows how to load EML files into MapiMessage while preserving the format of embedded EML files.

Try it out!

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// For complete examples and data files, please go to https://github.com/aspose-email/Aspose.Email-for-Java
String dataDir = RunExamples.getDataDir_Email();

MailMessage eml = MailMessage.load(dataDir + "sample.eml", new EmlLoadOptions());

MapiConversionOptions options = MapiConversionOptions.getUnicodeFormat();

//Preserve Embedded Message Format
options.setPreserveEmbeddedMessageFormat(true);

//Convert EML to MSG with Options
MapiMessage msg = MapiMessage.fromMailMessage(eml, options);