Its a bit of odd isn’t? Do you have any email address created as wordpress@yourwebsite.com? or Is this email wordpress@yourwebsite.com really exists? Well, we can change up these names and email address easily using the following snippet. Simply add this code on your themes functions.php Don’t forget to change the name and email address in this …

wordpress custom_mail.php

add_filter( 'wp_mail_from', 'wp4_new_mail_from' );     
function wp4_new_mail_from( $old ) {
    return 'email@wesbite.com'; // Edit it with your official email address
}

add_filter('wp_mail_from_name', 'wp4_new_mail_from_name');
function wp4_new_mail_from_name( $old ) {
    return 'Webmaster'; // Edit it with your official name
}