title: How to add Unsubscribe link in email sending to multiple users at once
body: <p>I am sending notification mails to all the registered users in the site with an Unsubscribe link. Currently I am lopping through all users in the db and sending mail to each user. For the Unsubscribe link i am adding the user email to differentiate between each users when they click the link. Everything except the Unsubscribe link is same in the email.</p>
  
  <p>Is there any way to send mail to all users at once without looping and get the Unsubscribe link for each user different, so that i can differentiate between each user when they click the link</p>