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 qctkoe1619lcjqmu328iv50qb41lqj89.spamfilter.io is not the root of its zone.
Instead, try zone transfer on spamfilter.io .
Instead, try zone transfer on spamfilter.io .