Mail send once shows two time in sent folder.

Mail send once shows two time in sent folder.

Dear sir,

My id is nec@fireage.in, I have setup account in Outlook express using IMAP setting & its working fine.

I have also forwarded the mails to few other email ID's.

When send mail to anyone only once, but that mail  show Two time in my sent Item list.

please resolve this or atlist pls tell me where I am making mistake.

Thanks