Bandwidth Limiting with ipfw and WEBServices/MailServices

[Vahric MUHTARYAN]

Hi Everybody , 

I want to learn two things ?! 
First,Does bandwith limiting affect high loaded MailServers and Web
Servers?! Because I know if I set bandwith limit I have to set queue at this
moment some queue delay can be occur ?! 

I think that mail server can handle it because SMTP will work under slow
link. Does this limitation suitable for Web Server ( http protocol ) ?!! 

Any advise ?_

Vahric