WordPress self-hosting: How to change default email sender name?

Well, let’s get to the answers! So far, I’ve found two ways how to fix the problem.
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1. I call it ‘a temporary trick’, anyway, let’s go to the wp-include directory and open pluggable.php, then search:

   $from_name = 'WordPress';

   and change it with your name (website name or anything you want).It’s simple and it works, indeed! Unfortunately we have a drawback here, you have to do it every time you update WordPress into the recent one. That’s why I called it a temporary trick. However I use it because it’s effective.

2. Through functions.php, and this is ‘perhaps’ the smartest way
   Open your functions.php and add this code: 

   add_filter('wp_mail_from', 'new_mail_from');
   add_filter('wp_mail_from_name', 'new_mail_from_name');
   
   function new_mail_from($old) {
       return 'admin@yourblogname.com';
   }
   function new_mail_from_name($old) {
       return 'Blog Name';
   }

   However, I haven’t tried this way, so I don’t know whether it works or not 😛

Sources:

• http://wordpress.org/support/topic/problem-with-e-mail-sender-name?replies=2
• http://www.webanddesigners.com/change-wordpress-default-mail-sender/

I hope it is useful 🙂