Zimbra desktop not getting email from server

[BOOTHCONSULT]

My Vista based laptop stopped accessing isp mail server yesterday. Sample of today's log follows:

2009-01-15 11:04:25,863 INFO [mid=2] [] datasource - Importing data for data source 'RCN Mail'
2009-01-15 11:04:28,118 INFO [mid=2] [] datasource - Import completed for data source 'RCN Mail'
2009-01-15 11:04:28,119 INFO [mid=2] [] offline - sync connection down: RCN Mail
2009-01-15 11:14:30,863 INFO [mid=2] [] offline - >>>>>>>> name=rcbooth@rcn.com;version=0.92;build=1418;relea se=BETA;os=Windows Vista x86 6.0;type=pop3
2009-01-15 11:14:30,864 INFO [mid=2] [] datasource - Importing data for data source 'RCN Mail'
2009-01-15 11:14:33,119 INFO [mid=2] [] datasource - Import completed for data source 'RCN Mail'
2009-01-15 11:14:33,120 INFO [mid=2] [] offline - sync connection down: RCN Mail
2009-01-15 11:25:34,685 DEBUG [main] [] offline - Loading 6 folder mappings for service 'yahoo.com'
2009-01-15 11:25:34,701 DEBUG [main] [] offline - Loading 2 attrs for service 'yahoo.com'
2009-01-15 11:25:34,701 DEBUG [main] [] offline - Loading 19 folder mappings for service 'gmail.com'
2009-01-15 11:25:34,701 DEBUG [main] [] offline - Loading 2 attrs for service 'gmail.com'
2009-01-15 11:25:34,701 DEBUG [main] [] offline - Loading 5 folder mappings for service 'aol.com'
2009-01-15 11:25:34,701 DEBUG [main] [] offline - Loading 8 folder mappings for service '.m***change'
2009-01-15 11:25:34,701 DEBUG [main] [] offline - Loading 9 folder mappings for service 'hotmail.com'
2009-01-15 11:25:39,240 INFO [main] [] log - No Transaction manager found - if your webapp requires one, please configure one.
2009-01-15 11:25:39,724 INFO [main] [] log - Opened C:\zimbra\zdesktop\jetty\logs\access_log.2009-01-15
2009-01-15 11:25:39,755 INFO [main] [] log - Started SelectChannelConnector@localhost:7633
2009-01-15 11:25:40,863 INFO [mid=2] [] offline - >>>>>>>> name=rcbooth@rcn.com;version=0.92;build=1418;relea se=BETA;os=Windows Vista x86 6.0;type=pop3
2009-01-15 11:25:40,878 INFO [mid=2] [] datasource - Importing data for data source 'RCN Mail'
2009-01-15 11:26:02,765 INFO [mid=2] [] datasource - Import completed for data source 'RCN Mail'
2009-01-15 11:26:02,952 ERROR [mid=2] [] offline - sync failure: RCN Mail
com.zimbra.common.service.ServiceException: system failure: POP3 server must support UIDL extension
ExceptionId:mid=2:1232036762765:889b90889c63033f
Code:service.FAILURE
at com.zimbra.common.service.ServiceException.FAILURE (ServiceException.java:253)
at com.zimbra.cs.datasource.Pop3Sync.fetchAndRetainMe ssages(Pop3Sync.java:158)
at com.zimbra.cs.datasource.Pop3Sync.importData(Pop3S ync.java:113)
at com.zimbra.cs.datasource.DataSourceManager.importD ata(DataSourceManager.java:154)
at com.zimbra.cs.mailbox.LocalMailbox.importData(Loca lMailbox.java:367)
at com.zimbra.cs.mailbox.LocalMailbox.syncAllLocalDat aSources(LocalMailbox.java:340)
at com.zimbra.cs.mailbox.LocalMailbox.sync(LocalMailb ox.java:401)
at com.zimbra.cs.mailbox.LocalMailbox.syncOnTimer(Loc alMailbox.java:312)
at com.zimbra.cs.mailbox.DesktopMailbox$1.run(Desktop Mailbox.java:262)
at java.util.TimerThread.mainLoop(Unknown Source)
at java.util.TimerThread.run(Unknown Source)
2009-01-15 11:27:03,043 INFO [mid=2] [] offline - >>>>>>>> name=rcbooth@rcn.com;version=0.92;build=1418;relea se=BETA;os=Windows Vista x86 6.0;type=pop3
2009-01-15 11:27:03,043 INFO [mid=2] [] datasource - Importing data for data source 'RCN Mail'
2009-01-15 11:27:17,489 INFO [mid=2] [] datasource - Import completed for data source 'RCN Mail'
2009-01-15 11:27:17,489 ERROR [mid=2] [] offline - sync failure: RCN Mail
com.zimbra.common.service.ServiceException: system failure: POP3 server must support UIDL extension
ExceptionId:mid=2:1232036837489:889b90889c63033f
Code:service.FAILURE
at com.zimbra.common.service.ServiceException.FAILURE (ServiceException.java:253)
at com.zimbra.cs.datasource.Pop3Sync.fetchAndRetainMe ssages(Pop3Sync.java:158)
at com.zimbra.cs.datasource.Pop3Sync.importData(Pop3S ync.java:113)
at com.zimbra.cs.datasource.DataSourceManager.importD ata(DataSourceManager.java:154)

Any idea what caused problem? Has worked fine for many months.

[jjzhuang]

We currently don't support POP server that don't support the UIDL extension.

Bug 30643 – Optional Support to disable UIDL-Requirement for POP3 Servers

[BOOTHCONSULT]

As I noted, I've been using Zimbra to access this mail server for many months and there has been no problem and no log messages abou UIDL support prior to the last couple of days. That message appears to be a red herring.

[jjzhuang]

From the error you posted that's exactly what it was. Could it be possible that the server settings of this POP server changed?