Thank you falko,
as per ur instruction... i have done it ......
i checked maildir under management ->server ->setting and i see one difference while maildir check/uncheck
like, when i uncheck maildir and when i tries to create new user there are two field for user space ie. web space and mail space under ISP Manager->domain->email->new
and when i check maildir i can see only web space under ISP Manager->domain->email->new
What is that.... ??? does it make any difference to my ISPConfig system.... ?? what is the difference between them....???
once again thank you....