SurfaceMap › r › rekenkamer.nl

rekenkamer.nl

Checked 2026-10-21 21:24 UTC · first added 2026-10-21

!Check could not complete

Domain & DNS

error

30 passed 0 warn 0 failed 1 errors

lookups failed for rdap; results are incomplete

Areas

iRegistration ✓Delegation iNameservers ✓SOA ✓DNSSEC ✓Records

Recent checks

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Full report

Domain & DNS report for rekenkamer.nl ›

Mail

warn

25 passed 4 warn 0 failed

Areas

✓SPF !DMARC ✓DKIM ✓DNSSEC !MX !TLS iBIMI

Problems

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Single MX host, no backup

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

#12
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No aggregate reports (rua)

DMARC · DMARC record has no rua tag, so you receive no aggregate reports about who sends mail as your domain. Add rua=mailto:...

#19
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Addresses without reverse DNS

MX · These MX addresses have no PTR record, which many receivers treat as a spam signal: 2a04:9a00:111c:11::a (mailfilter01.rekenkamer.nl). Ask your hosting provider to set one.

#30
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Not configured

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.

#32

Recent checks

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Full report

Mail report for rekenkamer.nl ›