How do you manage the "nndraft:queue" folder?

[Live System User <nyc4bos@aol.com>]

Hi,

      How does one manage the "nndraft:queue" folder?

      Is there a way for Gnus to indicate to you that there
      are messages queued in the "nndraft:queue" folder that
      need processing either notifying periodically and/or
      when subsequently invoking Gnus again later on?  I only
      noticed that there was a message in my "nndraft:queue"
      folder" because of a problem that I tried to report that
      hung while sending and had to C-g and tried again and got
      the message:

             Denied posting -- multiple copies

     The "*unsent..." buffer remained.

     If there are multiple messages in the "nndraft:queue" folder,
     is there a way to *ONLY* send particular queued messages or
     is it an all-or-nothing situation?  Is it possible to mark
     some messages then having *only* those messages sent?

     Can you manually queue a newly composed message *without* it
     being sent immediately?  Can you set some option temporarily
     so that all subsequent messages get queued until you change
     that option to say "deliver any newly created messages now
     but not any that were already queued beforehand"?

     How can one setup Gnus to send messages base on a condition(s)
     like when on Wi-Fi, between specific hours, when on ethernet
     and the size of the message is greater than a particular
     threshold, etc.?

     Are these possible to do with Gnus *without* requiring the
     use of a local SMTP server?

     Thanks.