I'm currently working on laravel mail. I've sending email structure with attachment like this:
$document  = Document::find($request->document_id);
Mail::send('email.senddocs', array('project'=>$document->project->name,'type'=>$document->documentType->type), function($message) use($request,$document){
    $file_name = public_path().'/documents/'.$document->project->p_key.'/'.$document->file_name;
    $message->from('us@example.com', 'DDMS');
    $message->to($request->email);
    $message->attach($file_name);
});
I've already visited here. But, the process over there always returning success.
What I actually want is to know if mail is send or not. In my case, Mail sending can fail due to fake email like akdjbaksdjf@jhbasdhadfs.com or by some other errors occurred. 
How can I know mail is sent or not ?
Any help is appreciated
 
    