import-mbox dry run should exercise as much as possible of the code
import-mbox dry run should exercise as much as possible of the code

This fixes #258
quenda/ponymail,Humbedooh/ponymail,jimjag/ponymail,quenda/ponymail,quenda/ponymail,jimjag/ponymail,Humbedooh/ponymail,jimjag/ponymail,jimjag/ponymail,Humbedooh/ponymail