Check the file sizes in the
/home/e-smith/files/users/user/Maildir/;folder/cur
I have the same problem. When restoring them all the files were 0 byted even though they have sizes in the archive. So far I havent been able to work out how to restore mine - WinRar will restore some but restores the rest as 0 byte, unrar on the SME server cant open the archives..