Domain Overview
DNS: ✓ 2mo ago
Checker: ✓ 2mo ago
valckenburgschule.de
Yes
✓ Yes
Unknown
No
No
⚠ Yes
No
No
Checked via [email protected]
· 2026-03-27 14:15:09 UTC · ↺ Refresh
MX Hostnames
- mail.valckenburgschule.de
MX Priorities
- mail.valckenburgschule.de: 10
A / AAAA Records
- 81.169.145.95 ↩ w8f.rzone.de
- 2a01:238:20a:202:1095:: ↩ w8f.rzone.de
Mail Server IPs
- 148.251.5.116 ↩ mail.valckenburgschule.de
SOA Record
Raw SOA
shades15.rzone.de hostmaster.strato-rz.de 2020051005 86400 7200 604800 300
Primary NS (mname)
shades15.rzone.de
Admin Email (rname)
hostmaster@strato-rz.de
Serial
2020051005
Refresh
86400s
Retry
7200s
Expire
604800s
Minimum TTL
300s
Nameservers (NS)
docks07.rzone.de
shades15.rzone.de
SPF Record
✓ Soft Fail (~all)
v=spf1 mx a a:vu.prolink.de ~all
📊 DNS lookups: 3/10
~ Soft fail (~all) — moderate enforcement
DMARC Record
✓ Reject
v=DMARC1;p=reject;
✓ Reject — strongest protection
📋 SPF alignment: Relaxed
· DKIM alignment: Relaxed
⚠ No aggregate reports (rua= not set)
DKIM Selectors
✓ 1 found
dkim._domainkey
✓ Public key: 392 chars (valid)
✓ DKIM properly configured for selector: dkim
Checked: google, selector1/2, default, mail, dkim, k1, s1/2, zoho, sendgrid, mxvault, amazonses
All TXT Records
2 records- SPFv=spf1 mx a a:vu.prolink.de ~all
- DMARCv=DMARC1; p=reject; rua=mailto:[email protected]
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