Sending bulk email using laravel queue

Question

We are trying to send bulk email (100k) with PHP Laravel framework. Which way is the correct way to send bulk email with Laravel queue?

Case 1.

//controller
public function runQueue(){    
    dispatch(new ShootEmailJob());
}

//job 
public function handle(){
        $emails = EmailList::get(['email']);

        foreach($emails as $email){
            Mail::to($email)->send();
        }
 }

Case 2.

//controller
public function runQueue(){

    $emailList = EmailList::get(['email']);

    foreach($emailList as $emailAddress){
        dispatch(new ShootEmailJob($emailAddress->email));
    }
}

//job    
 public function handle(){
    Mail::to($emailAddress)->send(new ShootMail($emailAddress));
 }

Which one is the correct approach case 1 or case 2?

Answer 1

The first approach will first fetch all emails and then send them one by one in one "instance" of a job that is run as a background process if you queue it.

The second approach will run n "instances" of jobs, one for each email on the background process.

So performance-wise option 1 is the better approach. You could also wrap it in a try - catch block in case of exceptions so that the job does not fail if one of the emails fails, eg:

try {

     $emails = EmailList::get(['email']);

    foreach($emails as $email){
        Mail::to($email)->send();
    }

} catch (\Exception $e) {
   // Log error
   // Flag email for retry
   continue;
}