smtpctl spf walk -6 ?

[Harald Dunkel]

Hi folks,

I am a big fan of IPv6, so I wonder why smtpctl spf walk omits
all the IPv6 addresses?

        # echo spf.protection.outlook.com | smtpctl spf walk
        40.92.0.0/15
        40.107.0.0/16
        52.100.0.0/14
        104.47.0.0/17
        51.4.72.0/24
        51.5.72.0/24
        51.5.80.0/27
        20.47.149.138/32
        51.4.80.0/27

        # dig spf.protection.outlook.com TXT +short | tr \  \\n
        "v=spf1
        ip4:40.92.0.0/15
        ip4:40.107.0.0/16
        ip4:52.100.0.0/14
        ip4:104.47.0.0/17
        ip6:2a01:111:f400::/48
        ip6:2a01:111:f403::/48
        include:spfd.protection.outlook.com
        -all"

        # echo spf.protection.outlook.com | smtpctl spf walk -6
        invalid command


Regards
Harri