[Evolution] IMAP+ plugin for evolution v2.12.3

[Thomas Walker <walker stsci edu>]

  I have some folders with a large number of messages in them, when I 
use evolution v2.12.3 I get an error about Refreshing the folder when I 
try to browse to them.  Smaller folders work just fine.  One of the 
examples is a folder with 2,220 message in it.  By using a machine with 
evolution version 2.30 I found that selecting the IMAP+ type instead of 
IMAP fixes the problem.  Looking at the doc for IMAP+ one of it's 
features is to download messages in batches, so I think that's what I need.
  However, I cannot upgrade my OS, so I am stuck with evolution 2.12 
for now.  Is there any way to either get the IMAP+ plugin for my version 
or to at least get the "download in batches" feature?
  thanks for your help,

  Thomas Walker