Domain Overview
DNS: ✓ 2mo ago
Checker: ✓ 2mo ago
ruhr-reggae-summer.de
Yes
✓ Yes
Unknown
No
No
⚠ Yes
No
No
Checked via [email protected]
· 2026-03-28 17:48:43 UTC · ↺ Refresh
MX Hostnames
- mail.u-concert.de
MX Priorities
- mail.u-concert.de: 10
A / AAAA Records
- 94.130.8.226 ↩ u2.u-concert.de
- 2a01:4f8:10b:d1f::2 ↩ u2.u-concert.de
Mail Server IPs
- 88.99.57.136 ↩ u1.u-concert.de
- 2a01:4f8:10a:9d7::2 ↩ u1.u-concert.de
SOA Record
Raw SOA
ns1.first-ns.de domains.u-concert.de 2024070802 10800 3600 1209600 10800
Primary NS (mname)
ns1.first-ns.de
Admin Email (rname)
domains@u-concert.de
Serial
2024070802
Refresh
10800s
Retry
3600s
Expire
1209600s
Minimum TTL
10800s
Nameservers (NS)
ns1.first-ns.de
robotns2.second-ns.de
robotns3.second-ns.com
SPF Record
✓ Strict (-all)
v=spf1 a mx ip6:2a01:4f8:10b:d1f::2 ip6:2a01:4f8:10a:9d7::2 ip4:88.99.57.136 ip4:94.130.8.226 -all
📊 DNS lookups: 2/10
✓ Hard fail (-all) — strict enforcement
DMARC Record
~ Quarantine
v=DMARC1; p=quarantine; adkim=s; aspf=s
~ Quarantine — good protection (failing mail goes to spam)
📋 SPF alignment: Strict
· DKIM alignment: Strict
⚠ No aggregate reports (rua= not set)
DKIM Selectors
✗ None detectedNo DKIM records found for common selectors — your provider may use a custom selector name.
Checked: google, selector1/2, default, mail, dkim, k1, s1/2, zoho, sendgrid, mxvault, amazonses
All TXT Records
1 record- SPFv=spf1 a mx ip6:2a01:4f8:10b:d1f::2 ip6:2a01:4f8:10a:9d7::2 ip4:88.99.57.136 ip4:94.130.8.226 -all
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