Failure communicating with remote server. Please try again later.

Debug message: Invalid text character '\0'

Exception:

com.zimbra.common.service.ServiceException: system failure: Unable to connect to IMAP server: DataSource: { id=b0b009d5-9afd-40c1-8494-528da07b560f, type=imap, isEnabled=true, name=Tec-Attic, host=imap.tec-attic.com, port=143, connectionType=tls_if_available, username=andy@tec-attic.com, folderId=1 }
ExceptionId:sync-mbox-andy@tec-attic.com:1399068068687:a931dc0eeb0d2b99
Code:service.FAILURE
at com.zimbra.common.service.ServiceException.FAILURE (ServiceException.java:253)
at com.zimbra.cs.datasource.imap.ConnectionManager.ne wConnection(ConnectionManager.java:168)
at com.zimbra.cs.datasource.imap.ConnectionManager.op enConnection(ConnectionManager.java:85)
at com.zimbra.cs.datasource.imap.ImapSync.connect(Ima pSync.java:113)
at com.zimbra.cs.datasource.imap.ImapSync.importData( ImapSync.java:162)
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.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(Unknown Source)
at java.util.TimerThread.run(Unknown Source)
Caused by: com.zimbra.cs.mailclient.ParseException: Invalid text character '\0'
at com.zimbra.cs.mailclient.imap.ImapInputStream.read Text(ImapInputStream.java:286)
at com.zimbra.cs.mailclient.imap.ImapInputStream.read Text(ImapInputStream.java:271)
at com.zimbra.cs.mailclient.imap.ImapResponse.readRes ponse(ImapResponse.java:46)
at com.zimbra.cs.mailclient.imap.ImapResponse.read(Im apResponse.java:38)
at com.zimbra.cs.mailclient.imap.ImapConnection.readR esponse(ImapConnection.java:654)
at com.zimbra.cs.mailclient.imap.ImapConnection.proce ssGreeting(ImapConnection.java:85)
at com.zimbra.cs.mailclient.MailConnection.connect(Ma ilConnection.java:77)
at com.zimbra.cs.datasource.imap.ConnectionManager.ne wConnection(ConnectionManager.java:146)
... 13 more