My Email server is IMAP on my home network and I can connect to it with a different email client. When I use Zimbra to try to connect it comes up with this error.

I have tried changing passwords and starting and stopping both email server and client

Debug message: Request already pending

Exception:

com.zimbra.common.service.ServiceException: system failure: Synchronization of folder 'Trash.Junk E-mail' failed
ExceptionId:mid=5:1239406806281:b8a01e3e36da4291
Code:service.FAILURE
at com.zimbra.common.service.ServiceException.FAILURE (ServiceException.java:253)
at com.zimbra.cs.datasource.ImapSync.syncFailed(ImapS ync.java:291)
at com.zimbra.cs.datasource.ImapSync.syncRemoteFolder s(ImapSync.java:214)
at com.zimbra.cs.datasource.ImapSync.syncFolders(Imap Sync.java:186)
at com.zimbra.cs.datasource.ImapSync.importData(ImapS ync.java:145)
at com.zimbra.cs.offline.OfflineImport.importData(Off lineImport.java:88)
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(Unknown Source)
at java.util.TimerThread.run(Unknown Source)
Caused by: java.lang.IllegalStateException: Request already pending
at com.zimbra.cs.mailclient.imap.ImapConnection.sendR equest(ImapConnection.java:462)
at com.zimbra.cs.mailclient.imap.ImapRequest.send(Ima pRequest.java:76)
at com.zimbra.cs.mailclient.imap.ImapRequest.sendChec kStatus(ImapRequest.java:80)
at com.zimbra.cs.mailclient.imap.ImapConnection.doSel ectOrExamine(ImapConnection.java:187)
at com.zimbra.cs.mailclient.imap.ImapConnection.selec t(ImapConnection.java:174)
at com.zimbra.cs.datasource.RemoteFolder.select(Remot eFolder.java:203)
at com.zimbra.cs.datasource.ImapFolderSync.createLoca lFolder(ImapFolderSync.java:515)
at com.zimbra.cs.datasource.ImapFolderSync.syncFolder (ImapFolderSync.java:129)
at com.zimbra.cs.datasource.ImapSync.syncRemoteFolder s(ImapSync.java:209)
... 11 more

If issue persists please post description and debug information here.