title: How to know mail is send and read by user when sending mail using SMTP,PHPmailer
body: <p>is anybody know any solution for below problem</p>
  
  <p>in my project, i am send email to client using smtp and php mailer and gmail script. so when i am send mail gmail send mail to particular client. for that i am passing gmail login and user name which is valid. all mail are sending properly. but sometime it may happen that some client not receive mail and at that time i am not able to get or trace any error. so i there any way, when i am sending mail to client , and when client get it and read it at that time i got any kind of confirmation.</p>
  
  <p>Please if anybody have any idea , help me out.</p>