Mails with special chars in subject (e.g. +) cannot be fetched from Inbox folder

What steps will reproduce the problem?
1.Send a e-mail to Outlook Inbox with subject Weird chars blocking  exjello+
2. Try to consume with the client the sent message 

What is the expected output? 
 The message should be consumed
What do you see instead?
Excepttion:  
Caused by: javax.mail.MessagingException: Unable to obtain inbox: 404;
  nested exception is:
    java.lang.IllegalStateException: Unable to obtain inbox: 404
    at org.exjello.mail.ExchangeMessage.getContentStream(ExchangeMessage.java:70)
    at org.exjello.mail.ExchangeMessage.loadHeaders(ExchangeMessage.java:157)
    at org.exjello.mail.ExchangeMessage.getNonMatchingHeaderLine

What version of the product are you using? On what operating system?
exjello: 1.2.1 
OS: Windows 7 Entreprise

Please provide any additional information below.

the requested URL is:
https://<my_host>/exchange/<my_user>/Inbox/Weird%20chars%20blocking%20exjello%20
%2B.EML
This URL cannot be found.
Hope that it cant help you to solve the problem.
 Regards,
  Florin

Original issue reported on code.google.com by spicoflo...@gmail.com on 17 Sep 2012 at 10:37

renatocs87 / exjello

Mails with special chars in subject (e.g. +) cannot be fetched from Inbox folder #9