Domain Overview
DNS: ✓ 1mo ago
Checker: ✓ 1mo ago
rr-technik.de
Yes
✓ Yes
Unknown
No
No
⚠ Yes
No
No
Checked via [email protected]
· 2026-04-06 14:24:52 UTC · ↺ Refresh
MX Hostnames
- secure-mail.rr-beth.com
MX Priorities
- secure-mail.rr-beth.com: 20
A / AAAA Records
- 81.169.145.77 ↩ w0d.rzone.de
- 2a01:238:20a:202:1077:: ↩ w0d.rzone.de
Mail Server IPs
- 212.211.215.86 ↩ secure-mail.rr-beth.com
SOA Record
Raw SOA
docks15.rzone.de hostmaster.strato-rz.de 2020050826 86400 7200 604800 300
Primary NS (mname)
docks15.rzone.de
Admin Email (rname)
hostmaster@strato-rz.de
Serial
2020050826
Refresh
86400s
Retry
7200s
Expire
604800s
Minimum TTL
300s
Nameservers (NS)
docks15.rzone.de
shades08.rzone.de
SPF Record
✓ Strict (-all)
v=spf1 mx ip4:212.211.183.208 ip4:212.211.215.86 include:spf.protection.outlook.com -all
📊 DNS lookups: 2/10
✓ Hard fail (-all) — strict 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
✓ 3 found
selector1._domainkey
selector2._domainkey
dkim._domainkey
✓ Public key: 392 chars (valid)
✓ DKIM properly configured for selector: selector1
Checked: google, selector1/2, default, mail, dkim, k1, s1/2, zoho, sendgrid, mxvault, amazonses
All TXT Records
3 records- SPFv=spf1 mx ip4:212.211.183.208 ip4:212.211.215.86 include:spf.protection.outlook.com -all
- duo_sso_verification=8Rwln5dZGTZmnvVSuCfOMolgcIhMVV2KJ1oONJpY16cU2UHgKgEDvLFDoBEdyBKR
- MS=ms13142843
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