OFC you must specify both unless you have completely disabled sending of outgoing mail via IPv6.
Per Thorsheim <p...@thorsheim.net> skrev: (2 januari 2017 14:16:04 CET) >If using IP addresses in SPF records, is it necessary to specify both >IPv4 & IPv6 addresses? Is there currently a risk of unwanted problems >if >only IPv4 (or only IPv6) addresses are specified, when a mailserver is >available using both 4 & 6? > >-- >Best regards, >Per Thorsheim >Twitter: @thorsheim
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