Technical Tip: Greylist exemption for IPv6

The sender IP is in IPv4 format 0.0.0.0/0 by default.

A second exempt list entry with the sender IP as::/0 and the reverse DNS pattern should allow the greylist to be exempted when sourced from IPv6 IPs.

From CLI:

# config antispam greylist exempt
    edit 0
        set sender-ip ::/0
        set reverse-dns-pattern *.outbound.protection.outlook.com
    next
end

Change the reverse- dns-pattern as per the requirement if needed.