[Evolution] Where are evolution email messages in filesystem?

[mickeydog TaosNet com]

I received an email with a 29mb attachment which is causing evolution to
freeze. Evolution freezes when trying to display it, saying "Formatting
message(...)"

I am trying to delete the message via the filesystem (outside of evolution)
As root, I go to /home/my_username/.evolution/mail/local/ and i see the
mail folders, but i don't see messages.

Where are the messages?