Can I use the javax.mail.* classes in an application using the standard JRE? I know that these classes are part of J2EE, but can I use them separately or do I need to deploy everything else in J2EE? Surely not? ???
I want to deploy a simple GUI mail client without resorting to the low-level Socket class that you get in J2SE.
Generally, what are the licensing restrictions for all of the J2EE javax.* packages that you don’t get in J2SE?
20thCB
Handily you can ship just the javax.mail packages in a jar and it’s all nice and self-contained. AFAIK the javax.mail packages are entirely freely redistributable as long as you include the pointless license text file with them.
Cas 
Just go to the java.sun.com website and find their “list of java technologies” which I think is just a combobox. Select “java mail API” or similar and you’ll find you can get it all without even having heard of J2EE.
Aha so it is. I should look harder!