sieve forward all mails

require ["envelope"];
if anyof (address :is ["to", "cc"] "info@mydomain.de",
          envelope "to" "info@mydomain.de")
{
    redirect "person1@mydomain.de";
    redirect "person2@mydomain.de";
    discard;
}

BTW quote good examples are here: https://support.tigertech.net/sieve