ant mail task using mail and activation jar in external location

Question

I have following ant mail task -

Answer 1

See this answer to a similar question for a solution of library dependencies in ant.

In short, put all your ant addon libs, e.g. mail.jar,activation.jar, commons in a special folder and make it available for all your ant scripts via ANT_ARGS.
Being forced to use the exec task in ant to resolve a library dependency seems VERY strange.

In Eclipse common practice is to create a module in your repository (cvs,subversion,git). Then every team member has that module in his workspace and simply uses Window > Preferences > Ant > Runtime > Global Entries to make those dependencies available for ant.