WordPress at a glance
filter is not described

wp_mail_from filter-hook . WP 2.2.0

Filters the email address to send from.

Usage

add_filter( 'wp_mail_from', 'filter_function_name_7879' );
function filter_function_name_7879( $from_email ){
	// filter...

	return $from_email;
}
$from_email(string)
Email address to send from.

Where the hook is called

wp_mail()
wp-includes/pluggable.php 345
$from_email = apply_filters( 'wp_mail_from', $from_email );

Where the hook is used (in WP core)

Does not used.