Domain Overview
DNS: ✓ 3d ago
Checker: ✓ 3d ago
esr.nrw
Yes
✓ Yes
Unknown
No
No
⚠ Yes
No
No
Did you mean: [email protected]
Checked via [email protected]
· 2026-05-18 02:12:25 UTC · ↺ Refresh
MX Hostnames
- mail.host.nrw
MX Priorities
- mail.host.nrw: 10
A / AAAA Records
- 45.140.56.12 ↩ host1.host.nrw
- 2a0d:5940:57:11::2 ↩ host1.host.nrw
Mail Server IPs
- 45.140.56.14 ↩ mail.host.nrw
- 2a0d:5940:57:14::1 ↩ mail.host.nrw
SOA Record
Raw SOA
ns5.host.nrw hostmaster.host.nrw 2026051601 14400 1800 1209600 3600
Primary NS (mname)
ns5.host.nrw
Admin Email (rname)
hostmaster@host.nrw
Serial
2026051601
Refresh
14400s
Retry
1800s
Expire
1209600s
Minimum TTL
3600s
Nameservers (NS)
ns5.host.nrw
ns6.host.nrw
SPF Record
✓ Strict (-all)
v=spf1 a mx include:_spf.google.com -all
📊 DNS lookups: 3/10
✓ Hard fail (-all) — strict enforcement
DMARC Record
✓ Reject
v=DMARC1; p=reject; rua=mailto:[email protected]; ruf=mailto:[email protected]; fo=1;
✓ Reject — strongest protection
📋 SPF alignment: Relaxed
· DKIM alignment: Relaxed
📧 Reports → mailto:[email protected]
DKIM Selectors
✓ 2 found
google._domainkey
mail._domainkey
✓ Public key: 392 chars (valid)
✓ DKIM properly configured for selector: google
Checked: google, selector1/2, default, mail, dkim, k1, s1/2, zoho, sendgrid, mxvault, amazonses
All TXT Records
2 records- SPFv=spf1 a mx include:_spf.google.com -all
- google-site-verification=xvXctPdZ7cSAbeG2oOoWi0uGzlnbuUdoBjtFl1m3c4Y
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