Same problem here.
This is very bad, as I can not really rely on emails going out on a critical system.
Any help will be highly appreciated :-)
Simple: don't use Seam 2 Mail for critical systems. It's not particularly reliable and it is tied to JSF, which is known to be broken (by design :)), so it may work/not work depending on JSF version.
I face this error when I call this email function first time after restart my application server and i make simultaneos call in a loop. Once the template is compiled this error disapear for me. So far I havent found workaround for this problem.
Anybody found a solution for this problem? I have exactly the same problem as Jhon Oviedo.
I have encountered the same problem and actually we are looking for a workaround, too. Please contact me, if somebody has an acceptable solution.