/**
 * Globale Absenderadresse für Enfold Kontaktformulare
 */
add_filter( 'avf_form_from', 'custom_enfold_form_from', 10, 3 );

function custom_enfold_form_from( $from, $new_post, $form_params ) {
    return 'send@dr-koller.com';
}<?xml version="1.0" encoding="UTF-8"?>
<?xml-stylesheet type="text/xsl" href="https://kollerbeauty.at/wp-sitemap-index.xsl" ?>
<sitemapindex xmlns="http://www.sitemaps.org/schemas/sitemap/0.9"><sitemap><loc>https://kollerbeauty.at/wp-sitemap-posts-page-1.xml</loc></sitemap><sitemap><loc>https://kollerbeauty.at/wp-sitemap-posts-product-1.xml</loc></sitemap><sitemap><loc>https://kollerbeauty.at/wp-sitemap-taxonomies-product_cat-1.xml</loc></sitemap></sitemapindex>