WordPress at a glance
filter is not described

wp_mail_from_name filter-hook . WP 2.3.0

Filters the name to associate with the "from" email address.

Usage

add_filter( 'wp_mail_from_name', 'filter_function_name_3608' );
function filter_function_name_3608( $from_name ){
	// filter...

	return $from_name;
}
$from_name(string)
Name associated with the "from" email address.

Where the hook is called

wp_mail()
wp_mail_from_name
wp-includes/pluggable.php 354
$from_name = apply_filters( 'wp_mail_from_name', $from_name );

Where the hook is used (in WP core)

Does not used.