A detailed guide on PHP mail sending options with examples of using the built-in mail function(), PHPMailer, Pear mail, and Swift Mailer.

To learn about Jakarta Mail basics, sending messages via an SMTP server and more options to consider head to the original tutorial about how to send email with attachement in Java on Mailtrap Blog.

To send an HTML email, you should perform the same steps as for sending a simple text message, with only SendHTMLEmail class instead of just SendEmail. Also, you need to set content to the MimeMessage.setContent(Object, String) and indicate text/html type.

To add an image to your HTML email in Jakarta Mail, you can choose any of three regular methods: CID, base64 image, or linked image.

To embed a CID image, you need to create a MIME multipart/related message:

For a lot of folks out there, HTML on its own is boring, after all, nothing is exciting when there is no color in it. Now add some Cascading Style Sheets (CSS) either to your web page or an email, and things are colorful, engaging, and begin to stand out. 

But dealing with HTML email building that has CSS in it can be tricky due to the way email clients “read the code”. In this article, we will go over the main principles of using CSS in emails and take a look at some examples that demonstrate how to do so.