Let me tell you my Webserver configurations 

                            Normal Webhsting 
                            PHP 3.0.9 as a CGI module in Aapache 
                            max_execution_time=30 
                            safe_mode=0 

                            Problem: 

                            We have script whcich takes email address from a text file and writes into a
                            table. If there are 100 or 150 email it happens, but when it exceeds to 500 then
                            it come as Internal Server error. error_log says premature end of script.

                            I tried with set_time_limit(0) function within the loop or even outside of the loop
                            also. Even tried with echo(.),, flush(). But still it is not happening. 

                            Could you suggest a solution for this with the exact postion to include the
                            syntaxes.