Download the Java Mail API Jar


Currently, as of December 11th, 2018, the latest (released) Java Mail API is version 1.5
It was released on April 28th, 2017.
You may download the jar file from developer.Torello.Directory here:
javax.mail.jar (Version 1.5)
You may view the documentation online here:
javax.mail.jar Documentation (Version 1.5)


Here is the relevant information (copied from Oracle.com - above link!)

Downloads

April 28, 2017

Starting with JavaMail 1.5.0, the latest JavaMail releases are available from the JavaMail project page on GitHub


JavaMail Documentation 

The JavaMail documentation can be accessed online here. 

JavaMail Service Provider Guide 

(February 11, 1999) 
We are pleased to present the final version of the JavaMail Service Provider Guide. Please send comments to javamail_ww@oracle.com
Previous Releases
Recent releases can be found in the java.net Maven repository.

Very old releases are listed below:
JavaMail 1.4.5
JavaMail API 1.4.5, you can find it   here
JavaMail 1.4.4
JavaMail API 1.4.4, you can find it   here
JavaMail 1.4.3
JavaMail API 1.4.3, you can find it   here
JavaMail 1.4.2
JavaMail API 1.4.2, you can find it   here
JavaMail 1.4.1
JavaMail API 1.4.1, you can find it   here
JavaMail 1.4
JavaMail API 1.4, you can find it   here
JavaMail 1.3.3
JavaMail API 1.3.3, you can find it   here
JavaMail 1.3.2
JavaMail API 1.3.2, you can find it   here
JavaMail 1.3.1
JavaMail API 1.3.1, you can find it   here
JavaMail 1.3
JavaMail API 1.3, you can find it   here
JavaMail 1.2
JavaMail API 1.2, you can find it   here
JavaMail 1.1.3
JavaMail API 1.1.3, you can find it   here

See Also 
API Specification | FAQ | Feedback