[Zope3-dev] mail:queuedDelivery bug?

[Paolo Invernizzi]

<mail:smtpMailer
     name="msgboard-smtp"
     hostname="mail.cs.interbusiness.it"
     port="25" />

<mail:queuedDelivery
     name="Mail"
     permission="zope.SendMail"
     queuePath="./mail-queue"
     mailer="msgboard-smtp" />

++docapi++ tells that the name in queuedDelivery defaults to "Mail", but 
  if I delete it:

zope.configuration.config.ConfigurationExecutionError:
exceptions.TypeError:
The name provided to provideAdapter must be a string or unicode

Wrong docs or bug?
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Paolo Invernizzi