This is work...
At laaaaaast...I can use my mail again :D
So, when you have a difficulties by always having alert like "the server is not responding. Check your network connection or verify that you have entered the correct account info. you could change your host name with your domain ip address...
You don't have to delete and reinstall the mail but just edit the Host Name to be your domain server IP
my mail setting
INCOMING MAIL SERVER
Host Name XXX.XX.XX.XX. (IP of your domain server)
User Name you@domain.com
Password. Your password
SMPT
Check the SMPT of INCOMING MAIL SERVER
add server and fill the information of the server exactly like for the incoming mail server
Host Name IP domain server
User Name you@domain.com
Password your password
Use SSL ON
Authentication Password
Server Port 25
the advance section,
INCOMING SETTINGS
Use SSL OFF
Authetication Password
IMAP Path Previx /
Server Port 143
And I can use my mail again :)
Hope this could help anyone with the same problem like me (didnt work how many you delete and reinstal the email etc)