Changes since SOA version
IXFR is a zone transfer request that returns changes since a specific SOA version. Enter the SOA version to request changes since then.
Not an apex domain
The domain 95vascv8e675m4n3i3tc2bu2h51i73e1.spamfilter.io is not the root of its zone.
Instead, try zone transfer on spamfilter.io .
Instead, try zone transfer on spamfilter.io .