kobo.com

SOA · expire 3d is shorter than 7d; secondaries stop answering too soon when the primary is down. Current values: refresh 6h, retry 1h, expire 3d, negative TTL 5m.

DNSSEC · The zone is not signed with DNSSEC, so answers can be spoofed. Enable DNSSEC at your DNS provider and publish the DS record at your registrar.

DNSSEC · DNSSEC is not enabled for this domain. Consider enabling DNSSEC to protect against DNS spoofing attacks.

MX · The following MX hosts could not be resolved to IPv6 addresses: kobo-com.mail.protection.outlook.com

MX · Only one MX record found. For better email reliability, consider adding at least one backup MX server.

DMARC · These report addresses are in another domain that has not agreed to receive your reports, so receivers will not send them: mailto:kobo-DMARC_Report@mail.rakuten.com (needs kobo.com._report._dmarc.mail.rakuten.com). Ask the report provider to publish the record, or check the address.

TLS · MTA-STS is not configured, so other mail servers fall back to unencrypted delivery when TLS fails or is stripped by an attacker. Publish a _mta-sts TXT record and a policy at https://mta-sts.<domain>/.well-known/mta-sts.txt.