java - JavaMail API from Maven

Question

I am trying to upgrade to latest Java Mail utility.

From

<dependency>
    <groupId>javax.mail</groupId>
    <artifactId>mail</artifactId>
    <version>1.4.7</version>
</dependency>

to (my Intention)

<dependency>
    <groupId>javax.mail</groupId>
    <artifactId>mail</artifactId>
    <version>1.5.1</version>
</dependency>

But I don't find 1.5.1 for mail artifact,

but I can see

<dependency>
    <groupId>com.sun.mail</groupId>
    <artifactId>javax.mail</artifactId>
    <version>1.5.1</version>
</dependency>

My Question is why group id changed and if I change the group id for 1.5.1 do I need to change all my mail implementation that is already present (package name change and any other stuff) and what is the difference between com.sun.mail vs javax.mail?

Answer 1

The Maven coordinates changed some time ago to be compatible with the scheme described here. The new coordinates are here.

In short:

• The groupId javax.mail is no longer used for the implementation.
• There is a new artifact at javax.mail:javax.mail-api. It provides the javax.mail-api.jar file. This contains the JavaMail API definitions only, suitable for compiling against.
• com.sun.mail:javax.mail contains the javax.mail.jar file, the JavaMail reference implementation jar file, including the SMTP, IMAP, and POP3 protocol providers.

So, you should either use com.sun.mail:javax.mail for compilation and packaging/deploy, or use javax.mail:javax.mail-api for compilation and then deploy the com.sun.mail:javax.mail jar where appropriate (e.g., your Tomcat lib).