The icon for my POP3 account constantly shows as a red exclamation mark. When I click on it I get the following (although it does actually usually download my mail):

Failure communicating with remote server. Please try again later.

Debug message: Invalid end of line character

Exception:

com.zimbra.common.service.ServiceException: system failure: Synchronization of POP3 folder failed
ExceptionId:mid=3:1238746096465:8df87adcf50c9964
Code:service.FAILURE
at com.zimbra.common.service.ServiceException.FAILURE (ServiceException.java:253)
at com.zimbra.cs.datasource.Pop3Sync.importData(Pop3S ync.java:124)
at com.zimbra.cs.datasource.DataSourceManager.importD ata(DataSourceManager.java:154)
at com.zimbra.cs.mailbox.LocalMailbox.importData(Loca lMailbox.java:417)
at com.zimbra.cs.mailbox.LocalMailbox.syncAllLocalDat aSources(LocalMailbox.java:389)
at com.zimbra.cs.mailbox.LocalMailbox.sync(LocalMailb ox.java:431)
at com.zimbra.cs.mailbox.LocalMailbox.syncOnTimer(Loc alMailbox.java:361)
at com.zimbra.cs.mailbox.DesktopMailbox$1.run(Desktop Mailbox.java:436)
at java.util.TimerThread.mainLoop(Timer.java:512)
at java.util.TimerThread.run(Timer.java:462)
Caused by: com.zimbra.cs.mailclient.ParseException: Invalid end of line character
at com.zimbra.cs.mailclient.pop3.ContentInputStream.f illBuffer(ContentInputStream.java:84)
at com.zimbra.cs.mailclient.pop3.ContentInputStream.r ead(ContentInputStream.java:42)
at com.zimbra.cs.mailclient.pop3.ContentInputStream.s kipRemaining(ContentInputStream.java:64)
at com.zimbra.cs.mailclient.pop3.ContentInputStream.c lose(ContentInputStream.java:60)
at com.zimbra.cs.datasource.Pop3Sync.fetchAndAddMessa ge(Pop3Sync.java:197)
at com.zimbra.cs.datasource.Pop3Sync.fetchAndRetainMe ssages(Pop3Sync.java:185)
at com.zimbra.cs.datasource.Pop3Sync.importData(Pop3S ync.java:116)
... 8 more