Forwarding from a Fedora bug:
https://bugzilla.redhat.com/show_bug.cgi?id=591236


Description of problem:
evolution-mapi loses connection after running for a couple of hours.  An
Evolution restart is required to send or receive new messages, or to
create/edit calendar events.

Version-Release number of selected component (if applicable):
evolution-mapi-0.30.1-1.fc13.x86_64
evolution-2.30.1-3.fc13.x86_64

How reproducible:
always

Steps to Reproduce:
1. open evolution
2. leave running for a few hours
3.

Actual results:
new mail and existing (non-cached) mail cannot be read.

Expected results:
evolution should stay connected.

Additional info:
This happens with both calendar and mail events, sometimes independently. 
e.g., I won't be able to add or edit calendar events but I can still send
receive mail.

When I try to access a message when this happens, the following is output on
the console:

Thread 0 >
Get folder info(0x239cba0:mbox:/home/username/.evolution/mail/local,
'Templates') =
  uri: mbox:/home/username/.evolution/mail/local#Templates
  full_name: Templates
  flags: 00000008
< 0 >
Thread 0 >
CamelStore('mbox:/home/username/.evolution/mail/local'):get_folder('Templates',
0) = 0x239a5f0
< 0 >
Thread 0 >
Get folder info(0x239cba0:mbox:/home/username/.evolution/mail/local,
'Templates') =
  uri: mbox:/home/username/.evolution/mail/local#Templates
  full_name: Templates
  flags: 00000008
< 0 >
Thread 0 >
CamelStore('mbox:/home/username/.evolution/mail/local'):get_folder('Templates',
0) = 0x239a5f0
< 0 >
Thread 0 >
Get folder info(0x239cba0:mbox:/home/username/.evolution/mail/local,
'Templates') =
  uri: mbox:/home/username/.evolution/mail/local#Templates
  full_name: Templates
  flags: 00000008
< 0 >
Thread 0 >
CamelStore('mbox:/home/username/.evolution/mail/local'):get_folder('Templates',
0) = 0x239a5f0
< 0 >
CamelException.set(0x7feb2c17e740, 301, 'Could not get message')