I am having a hard time getting this started.

To explain further what I want to do, I currently have 1 file with a list of email addresses. These I am trying to use as my variables. I have another text file where I need to search for "email=john.edu" and replace with email=new_address.edu. Then I would like to save this file with the changes as new_address.txt. I have 100 email addresses in my list. I would like this process to repeat until the end of the adresses. I should have 100 new text files in this directory.

I am new to perl and really do not know where to start. I don't know how to read in my email list and search to replace just the new email address and save the entire file before continuing with the loop.

open (FILEHANDLE, "<$john.txt");    #open main file
open (DATA, "<email_list.txt");
@lines = <DATA>;
$/ = "\";
while (<DATA>)
{
#PROCESS AND UPDATE A RECORD
}
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If you can think of a better way to do this, please let me know. Thanks!!!!