I have FE/BE server configuration, recently I have installed a new ex2003 server as BE and transfer some mailboxes on to the new one, mails without attachment are going fine but with some attachment they are not delivered, if some one send the mail with attachment mail reaches to the mailbox it shows the attachment but as i open it if gives OPERATION FAILD. This problem is not with the one mail box but all the mail boxes are facing the problem, I create new users with mailbox on newel installed server but the result is same.Pl suggest me