New install of ZD 7.2.1, build 11637 on a Win XP/SP3 platform using IMAP. Added 2 Yahoo mail account and 1 Gmail account. Sync of one Yahoo account fails. Some folders are sync'd, others have yet to be sync'd. Receive the following (mail address change to XXXXX.XXX):

Failure communicating with remote server. Please try again later.

Debug message: Connection is closed

Exception:

com.zimbra.common.service.ServiceException: system failure: Folder sync failed
ExceptionId:sync-mbox-xxxxxx@xxxxx.com:1362867398839:0c596ccaae4e03df
Code:service.FAILURE
at com.zimbra.common.service.ServiceException.FAILURE (ServiceException.java:253)
at com.zimbra.cs.datasource.imap.ImapSync.importData( ImapSync.java:169)
at com.zimbra.cs.datasource.imap.ImapSync.importData( ImapSync.java:136)
at com.zimbra.cs.offline.OfflineImport.importData(Off lineImport.java:100)
at com.zimbra.cs.offline.YMailImport.importData(YMail Import.java:54)
at com.zimbra.cs.datasource.DataSourceManager.importD ata(DataSourceManager.java:317)
at com.zimbra.cs.datasource.DataSourceManager.importD ata(DataSourceManager.java:277)
at com.zimbra.cs.mailbox.DataSourceMailbox.syncAllLoc alDataSources(DataSourceMailbox.java:439)
at com.zimbra.cs.mailbox.DataSourceMailbox.sync(DataS ourceMailbox.java:478)
at com.zimbra.cs.mailbox.DataSourceMailbox.syncOnTime r(DataSourceMailbox.java:406)
at com.zimbra.cs.mailbox.SyncMailbox$1.run(SyncMailbo x.java:279)
at java.util.TimerThread.mainLoop(Timer.java:512)
at java.util.TimerThread.run(Timer.java:462)
Caused by: com.zimbra.common.service.ServiceException: system failure: Synchronization of folder '/Satellite' failed
ExceptionId:sync-mbox-xxxxxx@xxxxx.com:1362867398839:0c596ccaae4e03df
Code:service.FAILURE
at com.zimbra.common.service.ServiceException.FAILURE (ServiceException.java:253)
at com.zimbra.cs.datasource.imap.ImapSync.syncFailed( ImapSync.java:388)
at com.zimbra.cs.datasource.imap.ImapSync.syncMessage s(ImapSync.java:329)
at com.zimbra.cs.datasource.imap.ImapSync.syncFolders (ImapSync.java:239)
at com.zimbra.cs.datasource.imap.ImapSync.importData( ImapSync.java:164)
... 11 more
Caused by: java.io.IOException: Connection is closed
at com.zimbra.cs.mailclient.imap.ImapConnection.sendR equest(ImapConnection.java:498)
at com.zimbra.cs.mailclient.imap.ImapRequest.send(Ima pRequest.java:95)
at com.zimbra.cs.mailclient.imap.ImapRequest.sendChec kStatus(ImapRequest.java:111)
at com.zimbra.cs.mailclient.imap.ImapConnection.doSel ectOrExamine(ImapConnection.java:205)
at com.zimbra.cs.mailclient.imap.ImapConnection.selec t(ImapConnection.java:192)
at com.zimbra.cs.datasource.imap.RemoteFolder.select( RemoteFolder.java:198)
at com.zimbra.cs.datasource.imap.ImapFolderSync.syncM essages(ImapFolderSync.java:269)
at com.zimbra.cs.datasource.imap.ImapSync.syncMessage s(ImapSync.java:326)
... 13 more

A partial cut from the zdesktop.log

-mbox-xxxxxx@xxxxx.com] [] datasource - Remote folder 'Sent': Adding new message with UID 211486 detected while syncing flags
2013-03-09 17:15:15,652 DEBUG [sync-mbox-xxxxxx@xxxxx.com] [] datasource - Remote folder 'Sent': Adding new message with UID 417484 detected while syncing flags
2013-03-09 17:15:15,652 DEBUG [sync-mbox-xxxxxx@xxxxx.com] [] datasource - Remote folder 'Sent': Adding new message with UID 517672 detected while syncing flags
2013-03-09 17:15:15,652 DEBUG [sync-mbox-xxxxxx@xxxxx.com] [] datasource - Remote folder 'Sent': Fetching 938 new IMAP message(s)
2013-03-09 17:15:15,668 TRACE [sync-mbox-xxxxxx@xxxxx.com] [] imap-client - C: C52 UID FETCH 705502,705027,705013,705003,704008 (FLAGS INTERNALDATE)
2013-03-09 17:15:15,839 TRACE [sync-mbox-xxxxxx@xxxxx.com] [] imap-client - S: * 934 FETCH (FLAGS (\Seen) UID 704008 INTERNALDATE "06-Sep-2012 11:46:54 +0000")
2013-03-09 17:15:15,839 TRACE [sync-mbox-xxxxxx@xxxxx.com] [] imap-client - S: * 935 FETCH (FLAGS (\Seen) UID 705003 INTERNALDATE "07-Sep-2012 17:45:39 +0000")
2013-03-09 17:15:15,839 TRACE [sync-mbox-xxxxxx@xxxxx.com] [] imap-client - S: * 936 FETCH (FLAGS (\Seen) UID 705013 INTERNALDATE "07-Sep-2012 17:57:44 +0000")
2013-03-09 17:15:15,839 TRACE [sync-mbox-xxxxxx@xxxxx.com] [] imap-client - S: * 937 FETCH (FLAGS (\Seen) UID 705027 INTERNALDATE "07-Sep-2012 18:16:01 +0000")
2013-03-09 17:15:15,839 TRACE [sync-mbox-xxxxxx@xxxxx.com] [] imap-client - S: * 942 FETCH (FLAGS (\Seen) UID 705502 INTERNALDATE "08-Sep-2012 23:29:32 +0000")
2013-03-09 17:15:15,839 TRACE [sync-mbox-xxxxxx@xxxxx.com] [] imap-client - S: C52 OK UID FETCH completed
2013-03-09 17:15:15,839 DEBUG [sync-mbox-xxxxxx@xxxxx.com] [] datasource - Fetching messages for sequence: 705502,705027,705013,705003,704008
2013-03-09 17:15:15,839 TRACE [sync-mbox-xxxxxx@xxxxx.com] [] imap-client - C: C53 UID FETCH 705502,705027,705013,705003,704008 BODY.PEEK[]
2013-03-09 17:15:18,293 TRACE [sync-mbox-xxxxxx@xxxxx.com] [] imap-client - S: * 934 FETCH (UID 704008 BODY[] {4147}
)
2013-03-09 17:15:18,293 DEBUG [sync-mbox-xxxxxx@xxxxx.com] [] datasource - Remote folder 'Sent': Found new IMAP message with uid 704008
2013-03-09 17:15:18,918 DEBUG [sync-mbox-xxxxxx@xxxxx.com] [] datasource - Adding mapping for dataSource Yahoo Primary: itemId(1880), remoteId(5_704008)
2013-03-09 17:15:23,621 TRACE [sync-mbox-xxxxxx@xxxxx.com] [] imap-client - S: * 935 FETCH (UID 705003 BODY[] {3062226}
)
2013-03-09 17:15:23,621 DEBUG [sync-mbox-xxxxxx@xxxxx.com] [] datasource - Remote folder 'Sent': Found new IMAP message with uid 705003
2013-03-09 17:15:26,246 DEBUG [sync-mbox-xxxxxx@xxxxx.com] [] datasource - Adding mapping for dataSource Yahoo Primary: itemId(1882), remoteId(5_705003)
2013-03-09 17:15:30,511 TRACE [sync-mbox-xxxxxx@xxxxx.com] [] imap-client - S: * 936 FETCH (UID 705013 BODY[] {2657714}
)
2013-03-09 17:15:30,511 DEBUG [sync-mbox-xxxxxx@xxxxx.com] [] datasource - Remote folder 'Sent': Found new IMAP message with uid 705013
2013-03-09 17:15:32,324 DEBUG [sync-mbox-xxxxxx@xxxxx.com] [] datasource - Adding mapping for dataSource Yahoo Primary: itemId(1883), remoteId(5_705013)
2013-03-09 17:16:38,824 DEBUG [sync-mbox-xxxxxx@xxxxx.com] [] imap-client - setState: SELECTED -> CLOSED
2013-03-09 17:16:38,824 ERROR [sync-mbox-xxxxxx@xxxxx.com] [] datasource - UID FETCH failed: com.zimbra.cs.mailclient.CommandFailedException: UID FETCH failed: Timeout waiting for response
com.zimbra.cs.mailclient.CommandFailedException: UID FETCH failed: Timeout waiting for response
at com.zimbra.cs.mailclient.imap.ImapRequest.failed(I mapRequest.java:210)
at com.zimbra.cs.mailclient.imap.ImapRequest.send(Ima pRequest.java:98)
at com.zimbra.cs.mailclient.imap.ImapRequest.sendChec kStatus(ImapRequest.java:111)
at com.zimbra.cs.mailclient.imap.ImapConnection.uidFe tch(ImapConnection.java:331)
at com.zimbra.cs.datasource.imap.ImapFolderSync.fetch Messages(ImapFolderSync.java:843)
at com.zimbra.cs.datasource.imap.ImapFolderSync.fetch Messages(ImapFolderSync.java:750)
at com.zimbra.cs.datasource.imap.ImapFolderSync.syncM essages(ImapFolderSync.java:346)
at com.zimbra.cs.datasource.imap.ImapSync.syncMessage s(ImapSync.java:326)
at com.zimbra.cs.datasource.imap.ImapSync.syncFolders (ImapSync.java:239)
at com.zimbra.cs.datasource.imap.ImapSync.importData( ImapSync.java:164)
at com.zimbra.cs.datasource.imap.ImapSync.importData( ImapSync.java:136)
at com.zimbra.cs.offline.OfflineImport.importData(Off lineImport.java:100)
at com.zimbra.cs.offline.YMailImport.importData(YMail Import.java:54)
at com.zimbra.cs.datasource.DataSourceManager.importD ata(DataSourceManager.java:317)
at com.zimbra.cs.datasource.DataSourceManager.importD ata(DataSourceManager.java:277)
at com.zimbra.cs.mailbox.DataSourceMailbox.syncAllLoc alDataSources(DataSourceMailbox.java:439)
at com.zimbra.cs.mailbox.DataSourceMailbox.sync(DataS ourceMailbox.java:478)
at com.zimbra.cs.mailbox.DataSourceMailbox.syncOnTime r(DataSourceMailbox.java:406)
at com.zimbra.cs.mailbox.SyncMailbox$1.run(SyncMailbo x.java:279)
at java.util.TimerThread.mainLoop(Timer.java:512)
at java.util.TimerThread.run(Timer.java:462)
Caused by: java.net.SocketTimeoutException: Read timed out
at java.net.SocketInputStream.socketRead0(Native Method)
at java.net.SocketInputStream.read(SocketInputStream. java:129)
at com.sun.net.ssl.internal.ssl.InputRecord.readFully (InputRecord.java:293)
at com.sun.net.ssl.internal.ssl.InputRecord.read(Inpu tRecord.java:331)
at com.sun.net.ssl.internal.ssl.SSLSocketImpl.readRec ord(SSLSocketImpl.java:830)
at com.sun.net.ssl.internal.ssl.SSLSocketImpl.readDat aRecord(SSLSocketImpl.java:787)
at com.sun.net.ssl.internal.ssl.AppInputStream.read(A ppInputStream.java:75)
at java.io.BufferedInputStream.fill(BufferedInputStre am.java:218)
at java.io.BufferedInputStream.read(BufferedInputStre am.java:237)
at com.zimbra.cs.mailclient.MailInputStream.peek(Mail InputStream.java:132)
at com.zimbra.cs.mailclient.imap.ImapInputStream.matc h(ImapInputStream.java:346)
at com.zimbra.cs.mailclient.imap.ImapInputStream.skip Spaces(ImapInputStream.java:354)
at com.zimbra.cs.mailclient.imap.MessageData.read(Mes sageData.java:75)
at com.zimbra.cs.mailclient.imap.MessageData.read(Mes sageData.java:63)
at com.zimbra.cs.mailclient.imap.ImapResponse.readUnt agged(ImapResponse.java:106)
at com.zimbra.cs.mailclient.imap.ImapResponse.readRes ponse(ImapResponse.java:51)


Network timeouts? The folder being downloaded (Sent) is large.

Thanks,