if [ -z "${domain}" ]; then
    if [ $IMODE = n ]; then
        domain=$(whiptail --nocancel --inputbox "                        Enter the domain without WWW     " 11 82 --title "Config" 3>&1 1>&2 2>&3)
    elif [ $IMODE = l ]; then
        echo "Enter the domain without WWW:"
        read domain
    fi
fi

if [ "$shortdist" = "ubu1804" ] || [ "$osrel" = "ubu2004" ] || [ "$osrel" = "deb10" ] ; then
    debconf-set-selections <<< "postfix postfix/mailname string $domain"
    debconf-set-selections <<< "postfix postfix/main_mailer_type string 'Internet Site'"
fi