**** SMTP testing session as if from host 2001:ab8:37f:20::1
**** but without any ident (RFC 1413) callback.
**** This is not for real!

550 Administrative prohibition

**** SMTP testing session as if from host V6NET:1234:5:6:7:8:abc:d
**** but without any ident (RFC 1413) callback.
**** This is not for real!

550 Administrative prohibition

**** SMTP testing session as if from host V6NET:ffff:836f:a00:a:800:200a:c032
**** but without any ident (RFC 1413) callback.
**** This is not for real!

550 Administrative prohibition