too many files

[Kimberly Vher]

hi,

im almost finished thanks to all of you guys, but 
i noticed that if im using ./Maildir/ qmail creat one file for all the
incoming mail meaning one mail one file. if i have so many users then many
incoming mail for every users meaning i have so many many files in my
system in their home directory right? do i need to worry in filehandle error? 

anyone give me a suggestion to adjust the filehandle in linux?

thanks again