Change sender email address

I found the solution. Here is it:
Put into the functions.php of your theme
add_filter( ‘wp_mail_from’, ‘custom_wp_mail_from’ );
function custom_wp_mail_from( $original_email_address ) {
//Make sure the email is from the same domain
//as your website to avoid being marked as spam.
return ‘your email address’;
}
add_filter( ‘wp_mail_from_name’, ‘custom_wp_mail_from_name’ );
function custom_wp_mail_from_name( $original_email_from ) {
return ‘your name’;
}
Alternatively, build up a plugin with this content.