Methods in org.apache.taglibs.mailer.SetRecipientTag should not be final (resp. private) to allow (resp. facilitate) extensions. Im my case I have to change org.apache.taglibs.mailer.SetRecipientTag to a custom version with the methods doAfterBody not final and addToParent as protected rather than private to be able to write a custom extension tag that sets the recipient to a special address if the application is running in a development environment (this allows to test and develop without sending emails to "real" users, perhaps could it be interesting in this library).
Fixed in the 20040130 nightly build.
method SetRecipientTag.addToParent should be protected rather than private
Fixed in the 20040131 nightly build. I think I nailed it this time!