Aspose.Email is a set of controls for easy development of email-enabled applications, ASP.NET-based Web applications, Web services, and Windows applications. Supports Outlook PST, EML, MSG, and MHT formats. Allows developers to work directly with SMTP, POP, FTP, and MS Exchange servers. Supports mail merge, calendar, custom email headers and content, embedded files, etc.
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When sending emails, you may need to include multimedia content such as images, audio or video to make your messages more engaging and effective. To achieve this, our blog post provides some simple instructions on creating MIME (Multipurpose Internet Mail Extensions) messages.
We'll explore how to use Java to create an EML file with an image in the HTML body. It also details the steps involved in the process and provides sample code to help you get started. So, whether you're a Java developer or someone interested in learning how to create EML files from images, this article is for you!
Download the Java API for creating MIME messages
To programmatically create MIME messages in Java, you need to have Aspose.Email for Java installed in your project. This library is an important tool for Java developers, providing a wide range of functionality for handling e-mail. It allows developers to easily manipulate different aspects of MIME messages such as attachments, body, headers, encoding, and more. With Aspose.Email for Java, developers can easily create and customize MIME messages, providing an easy and efficient way to send rich multimedia emails.
Create EML files from scratch
With Aspose.Email for Java installed, it's time to create your first EML file from scratch. One of the easiest ways is to use the MailMessage class provided by the library. . The MailMessage class allows you to create email objects with various properties and methods enabling you to set details such as sender, recipient, subject, body, attachments, headers, etc. With the MailMessage class, you can easily customize emails to suit your needs and create professional-looking EML files ready to send to recipients.
The following steps and code snippets will help you create an EML from scratch:
The following steps and code snippets will help you create an EML from scratch:
- Create a new MailMessage object using the default constructor.
- Set the properties of the MailMessage object as desired.
- Use the save method to save the MailMessage object to an EML file.
// Create a new MailMessage object
MailMessage eml = new MailMessage();
// Set the sender address
eml.setFrom(new MailAddress("[email protected]"));
// Add a recipient address
eml.setTo(MailAddressCollection.to_MailAddressCollection(new MailAddress("[email protected]")));
// Set subject
eml.setSubject("New message");
// Set the HTML body
eml.setHtmlBody("<!DOCTYPE html>\n"
+ " <html>\n"
+ " <head>\n"
+ " <style>\n"
+ " h3{font-family:Verdana, sans-serif;color:#000000;background-color:#ffffff;}\n"
+ " p {font-family:Verdana, sans-serif;font-size:14px;font-style:normal;\n"
+ " font-weight:normal;color:#000000;background-color:#ffffff;}\n"
+ " </style>\n"
+ " </head>\n"
+ " <body>\n"
+ " <h3>New message</h3>\n"
+ " <p>This is a new message created by Aspose.Email.</p>\n"
+ " </body>\n"
+ " </html>");
// Save the MailMessage object to an EML file
eml.save("message_with_image.eml", SaveOptions.getDefaultEml());
The save method of the MailMessage class takes two parameters: the file path and save options . Save options specify the format of the output file.
Add images to HTML content
In order to add an image to the HTML body of an email, you need to embed the image using the "img" tag. This allows you to insert an image directly into the HTML code of your email so that it will be displayed when the recipient opens the email.
The following code snippet shows how to add an image to the HTML body of a message.
- The HTML body contains an image tag with the source attribute set to cid:image1.
- The AlternateView class is used to obtain an alternate view of the message body that contains embedded images .
- The LinkedResource class is used to represent the embedded image and its content ID is set to image1.
- Finally, the alternate view is added to the collection of message alternate views.
// Create a new instance of MailMessage class
MailMessage eml = new MailMessage();
// Set sender and recipient
eml.setFrom(new MailAddress("[email protected]"));
eml.setTo(MailAddressCollection.to_MailAddressCollection(new MailAddress("[email protected]")));
// Set subject and body
eml.setSubject("New message with image");
eml.setHtmlBody("<!DOCTYPE html>\n"
+ " <html>\n"
+ " <head>\n"
+ " <style>\n"
+ " h3{font-family:Verdana, sans-serif;color:#000000;background-color:#ffffff;}\n"
+ " p {font-family:Verdana, sans-serif;font-size:14px;font-style:normal;\n"
+ " font-weight:normal;color:#000000;background-color:#ffffff;}\n"
+ " </style>\n"
+ " </head>\n"
+ " <body>\n"
+ " <h3>New message</h3>\n"
+ " <p>This is a new message created by Aspose.Email.</p>\n"
+ " <img src='cid:myImage' />\n"
+ " </body>\n"
+ " </html>");
AlternateView alternateView = eml.getAlternateViews().get_Item(0);
LinkedResource imageResource = new LinkedResource(path + "image.png", MediaTypeNames.Image.PNG);
imageResource.setContentId("image1");
alternateView.getLinkedResources().addItem(imageResource);
eml.save("message_with_image.eml", SaveOptions.getDefaultEml());
Create EML files from HTML files
One way is to start with an HTML file and convert it to EML. If you want to send HTML as email, . For this, we first need to have HTML content. Let's call this file content.html. Here is an example:
<!DOCTYPE html> <html> <head> <title>My Email</title> </head> <body> <h1>Hello,</h1> <img src="logo.png" alt="Logo"> <p>This is my first email created form HTML.</p> </body> </html>
Also, you must prepare all HTML-containing images ahead of time and specify their correct paths in the HTML file.
Now we can easily create MailMessage content.html by setting the HTML body.
- First, create a new HtmlLoadOptions object.
- Sets a string containing the path to the image in PathToResources.
- If the EML should contain an AlternateView for plain text, set the ShouldAddPlainTextView property to true.
- Create a MailMessage object by loading an HTML file and passing the HtmlLoadOptions object as a parameter .
- Set additional message properties.
- Finally, use the Save method to save the MailMessage object to the EML file.
HtmlLoadOptions htmlloadOptions = new HtmlLoadOptions();
htmlloadOptions.setPathToResources(path);
htmlloadOptions.shouldAddPlainTextView(true);
var eml = MailMessage.load(path + "content.html", htmlloadOptions);
// Set sender and recipient
eml.setFrom(new MailAddress("[email protected]"));
eml.setTo(MailAddressCollection.to_MailAddressCollection(new MailAddress("[email protected]")));
// Set subject
eml.setSubject("New message from HTML");
// Save the message in EML format
eml.save("message_from_html.eml", SaveOptions.getDefaultEml());
Tips for Improving the View of HTML Messages in Outlook
To view an HTML message in Outlook, you need to make sure its code is compatible with the Outlook rendering engine, unlike most web browsers. Some common issues that can affect HTML email in Outlook include:
- Outlook does not support some of its tags and CSS properties, such as background-image, float, margin, padding, etc. You may need to use inline styles, tables, or conditional comments to achieve the desired layout and formatting.
- Outlook may add extra spaces or lines between elements, or remove some elements entirely. You may need to use non-breaking spaces, zero-width spaces, or empty table cells to prevent this.
- Outlook may change the encoding or character set of HTML files, which may cause some characters to display incorrectly. You may need to specify the encoding and charset in it using meta tags.
In this blog post, you learned how to create MIME messages programmatically in Java using Aspose.Email. Step-by-step tutorials and code samples show how to create eml files from scratch and from HTML files, add images to the HTML content of emails, and support all of the above with helpful tips on how to improve the view