I still think they can be removed because according to RFC 7208 they are discontinued.
However, if you disable the SPF record by using dns_spf=0 in directamin.conf and restart DA, the only change made is that you can’t see that SPF line anymore in the DA control panel.
But after that, the line is still present in the named database records, for example mycompany.nl.db in /var/named.
How can we remove them for all domains from the DNS records in /var/named?
perl -pi -e 's/\|TXT\|/|DOMAIN|. 14400 IN SPF ""/' named.db
[COLOR=#000000][FONT="]perl -pi -e 's/.*SPF.*$//' *.db[/FONT][/COLOR][COLOR=#000000][FONT=verdana][/FONT][/COLOR]