cubicweb-email #636929 find out why this email can't be imported [open]

juj reported:

Une erreur au moment de répondre par email à un fil de commentaire sur l'extranet.

Command died with status 1: "/usr/bin/cubicweb-ctl
   mboximport -H host -u user -p password instance -". Command output:
   Traceback (most recent
   call last):   File "/usr/share/cubicweb/cubes/email/", line
   66, in import_mbox_stream     self.import_message(message)   File
   "/usr/share/cubicweb/cubes/email/", line 104, in
   import_message     {'x': email.eid, 'y': self.address_eid(addr, name)})
   File "/usr/share/cubicweb/cubes/email/", line 205, in
   address_eid     alias=alias)   File
   "/usr/lib/python2.5/site-packages/cubicweb/", line 170, in
   create_entity     created = execute(rql, kwargs, cachekey).get_entity(0, 0)
   File "/usr/lib/python2.5/site-packages/cubicweb/", line 309, in
   execute     return self.cursor.execute(*args, **kwargs)   File
   "/usr/lib/python2.5/site-packages/cubicweb/", line 666, in execute
   parameters, eid_key, build_descr)   File
   "/usr/lib/python2.5/site-packages/Pyro/", line 390, in __call__
   return self.__send(self.__name, args, kwargs)   File
   "/usr/lib/python2.5/site-packages/Pyro/", line 468, in _invokePYRO
   return self.adapter.remoteInvocation(name,
   constants.RIF_VarargsAndKeywords, vargs, kargs)   File
   "/usr/lib/python2.5/site-packages/Pyro/", line 491, in
   remoteInvocation     answer.raiseEx()   File
   "/usr/lib/python2.5/site-packages/Pyro/", line 81, in raiseEx
   raise self.excObj ValidationError: 26474 (address): the value
   "" is already used, use another one
   create email 26473 failed to import the following messages:
done in<not specified>
load left0.500
closed by<not specified>