[rules-dev] mailer gui

I'm just working on a email gui for ruleflow. The idea here is a special action node for ruleflow where the variables used for the email action are determined by the rule LHS constraint, furhter more the email action GUI will execute for each matched tuple (row) of data. Nearly all fields will be processed as an MVEL template and thus its content will be interpolated if variables are used. Anyway looking for some feedback on initial GUI layout. Also any ideas on how best to impl error handling, I was just going to allow a logger to be specified, think it should do anything else? Are there any more JavaMail fields I should be exposing that would be useful?