Mail Api

Hi, I am working on a smtpclient plugin for mailing purpose and I have the choice between using apache smtpclient or using javamail api. Javamail is more simple and reliable when smtpclient offer a better monitoring. Which one should I use for a future integration in xwiki core ? In current XWiki core, mail plugin use java mail and validation email send by xwiki use smtpclient. Fabrice