Problem with Debian & zimbra 5

[MAGI System]

I have installed at my home zcs 5 on a debian 4.0 virtual machine.
zcs works perfectly but can't get external pop3 accounts automatically I have activated the automatic download of every pop3 account and every time i go to the pop3 settings the system reset the inbox folder of every pop3 account.

I have installed zimbra 3 times, deleting the entire virtual machine (because it's only a test for now).
Tonight i test another linux distributions in order to see if these problems are solved.

Anyone has these type of error?

[MAGI System]

I tried to installa zimbra on ubuntu 6.06 server, but pop3 account can't be fetched automatically.
what can i do?

[uxbod]

Could you expand further please ? What is happening ? Do any errors in your Log Files - Zimbra :: Wiki ?

[MAGI System]

No error in log, simply i want do download an external pop3 account but zimbra can't get it.
If you want i can get you access to my zimbra test server

[uxbod]

From the command line on your ZCS server are you able to

telnet _remoteserver_ 110

and get a response ?

[MAGI System]

yes i get a correct response with telnet