Use the right document type for asssessment
Use the right document type for asssessment

mbox_source does not equate mbox docs in terms of
tags allocated, so let's use mbox first and then switch
to source once tags have been processed.

quenda/ponymail,Humbedooh/ponymail,jimjag/ponymail,Humbedooh/ponymail,quenda/ponymail,Humbedooh/ponymail,quenda/ponymail,jimjag/ponymail,jimjag/ponymail,jimjag/ponymail