Command stream end of file while reading

Hello All,

I am using outlook Express for my mails, The mail server is a Linux Redhat
7.2 box with Qmail and
cyrus-sasl-1.5.24-25
cyrus-sasl-devel-1.5.24-25
cyrus-sasl-plain-1.5.24-25
cyrus-sasl-md5-1.5.24-25
imap-2001a-10

When i try to connect to the mail server it pops-up the login window for
Username and passwd , i entered the correct login name and passwd but still
it does not accept it.
When i checked for the logs here is what it says :
Aug 29 20:38:26 eric ipop3d[3330]: pop3 service init from 66.230.226.123
Aug 29 20:38:31 eric ipop3d[3330]: Command stream end of file while reading
line [email protected] host=[61.11.23.201]

When i use Webmail (Sqwebmail) the same thing works fine !

Why POP3 is not allowing outlook to check the mails....

The error means that the TCP connection has broken or the user didn;t logged
out properly etc... also somebody said that might be a DOS attack but that
is not the case..

Any help would be appreciated.

Thank you,
Tina.