用jquery对ajax调用进行循环

I want to send email to > 2000 recipients. I make a ajax call that sends 50 email and i want to repeat it until all emails will send. PHP function returns an array with 3 index, Success (count success mail), failed (count failed mail) and Finish (determine no more email exists). So, I get email count to counts and I use a counter (i) to determine how many email is sent. I want to break loop when i >= counts. Here is my code:I want to send email to > 2000 recipients. I ma