JavaX Mail is not a standard Java API or library. It seems you might be referring to the JavaMail API, which is a standard Java API for sending and receiving email messages. The JavaMail API provides a platform-independent and protocol-independent framework for building Java-based email client applications, email servers, and other email-related software.

Here are some key points about the JavaMail API:

1. Email Functionality: The JavaMail API allows Java applications to send, receive, and manipulate email messages using various email protocols, including SMTP (Simple Mail Transfer Protocol) for sending emails and IMAP (Internet Message Access Protocol) and POP3 (Post Office Protocol) for receiving emails.

2. Platform-Independent: JavaMail is platform-independent and can be used on various operating systems and Java platforms, making it a versatile choice for email-related tasks.

3. Message Handling: You can use JavaMail to create, format, and send email messages. It supports attachments, inline images, HTML content, and text messages. You can also retrieve and process email messages from mail servers.

4. Secure Communication: JavaMail supports secure email communication using protocols like SMTPS and IMAPS, which provide encryption and authentication for email exchanges.

5. Integration: JavaMail can be integrated with other Java technologies and libraries to build email-related features into Java applications. For example, it can be used alongside the Java Persistence API (JPA) to send notification emails or with Java EE web applications for email functionality.

6. MIME Support: The JavaMail API handles MIME (Multipurpose Internet Mail Extensions) types, allowing you to work with multimedia email content, including attachments and inline images.

7. Authentication: It supports various authentication methods, including username/password authentication, OAuth 2.0, and more, depending on the email server’s requirements.

8. Popular Usage: JavaMail is commonly used in applications like email clients, automated email notification systems, email marketing tools, and other email-related software.