Trouble connecting to POP3 server

[pdelbar]

I installed ZD on my Vista machine. Gmail account works fine, but adding my regular POP3 account fails every time. The error I get is :

Cannot connect to "mail.delius.be:110". Please check host/port and network connectivity.

Error log extract:

2009-01-05 22:02:33,757 INFO [btpool0-18] [] datasource - Testing: DataSource: { id=205b1a5c-7c5f-4b54-8d18-154239b3ac43, type=pop3, isEnabled=true, name=PP, host=mail.delius.be, port=110, connectionType=cleartext, username=paul.delbar@delius.be, folderId=2 }
2009-01-05 22:02:33,850 WARN [btpool0-18] [] datasource - Test failed: DataSource: { id=205b1a5c-7c5f-4b54-8d18-154239b3ac43, type=pop3, isEnabled=true, name=PP, host=mail.delius.be, port=110, connectionType=cleartext, username=paul.delbar@delius.be, folderId=2 }
com.zimbra.common.service.ServiceException: system failure: Unable to connect to IMAP server: DataSource: { id=205b1a5c-7c5f-4b54-8d18-154239b3ac43, type=pop3, isEnabled=true, name=PP, host=mail.delius.be, port=110, connectionType=cleartext, username=paul.delbar@delius.be, folderId=2 }
ExceptionId:btpool0-18:1231189353850:041b0ce4b35be77c
Code:service.FAILURE
at com.zimbra.common.service.ServiceException.FAILURE (ServiceException.java:253)
at com.zimbra.cs.datasource.Pop3Sync.connect(Pop3Sync .java:139)
at com.zimbra.cs.datasource.Pop3Sync.test(Pop3Sync.ja va:95)
at com.zimbra.cs.datasource.DataSourceManager.test(Da taSourceManager.java:64)
at com.zimbra.cs.account.offline.OfflineProvisioning. testDataSource(OfflineProvisioning.java:549)
at com.zimbra.cs.account.offline.OfflineProvisioning. createDataSourceAccount(OfflineProvisioning.java:6 41)
at com.zimbra.cs.account.offline.OfflineProvisioning. createAccount(OfflineProvisioning.java:446)
at com.zimbra.cs.service.admin.CreateAccount.handle(C reateAccount.java:58)
at com.zimbra.soap.SoapEngine.dispatchRequest(SoapEng ine.java:429)
at com.zimbra.soap.SoapEngine.dispatch(SoapEngine.jav a:286)
at com.zimbra.soap.SoapEngine.dispatch(SoapEngine.jav a:160)
at com.zimbra.soap.SoapServlet.doPost(SoapServlet.jav a:269)
at javax.servlet.http.HttpServlet.service(HttpServlet .java:727)
at com.zimbra.cs.servlet.ZimbraServlet.service(Zimbra Servlet.java:190)
at javax.servlet.http.HttpServlet.service(HttpServlet .java:820)
at org.mortbay.jetty.servlet.ServletHolder.handle(Ser vletHolder.java:487)
at org.mortbay.jetty.servlet.ServletHandler.handle(Se rvletHandler.java:362)
at org.mortbay.jetty.security.SecurityHandler.handle( SecurityHandler.java:216)
at org.mortbay.jetty.servlet.SessionHandler.handle(Se ssionHandler.java:181)
at org.mortbay.jetty.handler.ContextHandler.handle(Co ntextHandler.java:716)
at org.mortbay.jetty.webapp.WebAppContext.handle(WebA ppContext.java:406)
at org.mortbay.jetty.handler.ContextHandlerCollection .handle(ContextHandlerCollection.java:211)
at org.mortbay.jetty.handler.HandlerCollection.handle (HandlerCollection.java:114)
at org.mortbay.jetty.handler.HandlerWrapper.handle(Ha ndlerWrapper.java:139)
at org.mortbay.jetty.handler.RewriteHandler.handle(Re writeHandler.java:176)
at org.mortbay.jetty.handler.HandlerWrapper.handle(Ha ndlerWrapper.java:139)
at org.mortbay.jetty.Server.handle(Server.java:313)
at org.mortbay.jetty.HttpConnection.handleRequest(Htt pConnection.java:506)
at org.mortbay.jetty.HttpConnection$RequestHandler.co ntent(HttpConnection.java:844)
at org.mortbay.jetty.HttpParser.parseNext(HttpParser. java:644)
at org.mortbay.jetty.HttpParser.parseAvailable(HttpPa rser.java:211)
at org.mortbay.jetty.HttpConnection.handle(HttpConnec tion.java:381)
at org.mortbay.io.nio.SelectChannelEndPoint.run(Selec tChannelEndPoint.java:396)
at org.mortbay.thread.BoundedThreadPool$PoolThread.ru n(BoundedThreadPool.java:442)
Caused by: java.net.SocketException: Connection reset
at java.net.SocketInputStream.read(Unknown Source)
at com.sun.net.ssl.internal.ssl.InputRecord.readFully (Unknown Source)
at com.sun.net.ssl.internal.ssl.InputRecord.read(Unkn own Source)
at com.sun.net.ssl.internal.ssl.SSLSocketImpl.readRec ord(Unknown Source)
at com.sun.net.ssl.internal.ssl.SSLSocketImpl.perform InitialHandshake(Unknown Source)
at com.sun.net.ssl.internal.ssl.SSLSocketImpl.startHa ndshake(Unknown Source)
at com.sun.net.ssl.internal.ssl.SSLSocketImpl.startHa ndshake(Unknown Source)
at com.zimbra.common.util.CustomSSLSocket.startHandsh ake(CustomSSLSocket.java:197)
at com.zimbra.cs.mailclient.MailConnection.startTls(M ailConnection.java:294)
at com.zimbra.cs.mailclient.MailConnection.connect(Ma ilConnection.java:90)
at com.zimbra.cs.datasource.Pop3Sync.connect(Pop3Sync .java:131)
... 32 more

I am able to connect to this account from Thinderbird on the same machine without problems.

Any suggestions of what I am doing wrong or could try ?

Thanks !

[jjzhuang]

Your POP server advertises support of STARTTLS but it looks like it doesn't really like it. The difference between Thunderbird and Zimbra Desktop is that Zimbra Desktop will force the use of STARTTLS if the server advertises that capability.

[pdelbar]

Thanks for your swift response.

I have verified TLS operation and it is indeed configured (mail server is postfix). If I request Thunderbird to use TLS, it does do that and the connection works. So my guess is that TLS works as intended.

However, I am no expert , and the fine distinction between TLS and SSL is beyond my understanding. Is there an easy way I can verify whether TLS is actually working as ZD requires it ?

I am considering migrating to Zimbra server as well, but for the time being, I would like to be able to check POP3 mail as well, so this is a bit of a showstopper. Any help would be appreciated !

[jjzhuang]

how did you make Thunderbird use TLS? are you using the 'TLS if available' option or the 'TLS' option?

[pdelbar]

Both options (TLS if available and TLS) work correctly. The SSL option does not work however.

[jjzhuang]

OK, please file a bug with this information. Thanks!

[pdelbar]

Did that : Bug 34318 – ZDC cannot connect to POP3 client supporting TLS. If anyone needs more info (like user/pwd to test on our server) I can provide a test account on the server for you guys.

Thanks for the support. Now let's hope the bug gets resolved quickly.

[Kerri]

I am getting what seems to be the exact same problem. It works fine in Thunderbird and Outlook express but not Zimbra.

I would love to get it to work as I really like how Zimbra will sync my google calendar as I use Google calendar on my domain to show the companies I work for when I am available. I also like how I can get my yahoo account to work in it without paying extra while I cant (at least not to my knowledge) get it to work in Thunderbird.

My host provides this info for helping setup my domain. I tried both ways:

Manual Settings
Mail Server Username: klemperle+mydomain.com
Incoming Mail Server: mail.mydomain.com
Incoming Mail Server: (SSL) alpha.dnshostname.net
Outgoing Mail Server: mail.mydomain.com(server requires authentication) port 25
Outgoing Mail Server: (SSL) alpha.dnshostname.net(server requires authentication) port 465
Supported Incoming Mail Protocols: POP3, POP3S (SSL/TLS), IMAP, IMAPS (SSL/TLS)
Supported Outgoing Mail Protocols: SMTP, SMTPS (SSL/TLS)

[pdelbar]

All I can say is that I recognize the pattern. Other than submit the bug, I don't think there is much we can do. The forum contains a lot of POP3/TLS-related posts, perhaps there is a common issue underlying this.

Anyone out there with a similar experience ?

[jjzhuang]

Yeah we do see a number of similar issues. We haven't been able to reproduce this in our lab as the TLS servers we setup, any of IMAP/POP/SMTP, work just fine.