in your root pump.io (where package.json lives) do:
wget https://gist.githubusercontent.com/profOnno/d7a6cfaa801c8c9e0dcd/raw/c1a6e733804a7add5fe2af138795ec0885db25e2/simplesmtp.patch
patch -p0 simplesmtp.patchTo revert run :
patch -p0 -R simplesmtp.patchtest with
vows --spec test/email-notification-test.js test/event-test.jsResult without patch is 'callback not fired' with patch it should be ok