Domain Overview
DNS: ✓ 2mo ago
Checker: ✓ 2mo ago
collective-zero.de
Yes
✓ Yes
Unknown
No
No
⚠ Yes
No
No
Checked via [email protected]
· 2026-03-25 03:53:24 UTC · ↺ Refresh
MX Hostnames
- mail2.collective-zero.de
MX Priorities
- mail2.collective-zero.de: 10
A / AAAA Records
- 37.230.128.104 ↩ mail.collective-zero.de
- 2a0c:d480:c1c1:1286::d5a ↩ mail.collective-zero.de
Mail Server IPs
- 95.217.203.117 ↩ mail2.collective-zero.de
- 2a01:4f9:4a:4652::2 (no PTR)
SOA Record
Raw SOA
ns1084.ui-dns.org hostmaster.1und1.com 2017060454 28800 7200 604800 600
Primary NS (mname)
ns1084.ui-dns.org
Admin Email (rname)
hostmaster@1und1.com
Serial
2017060454
Refresh
28800s
Retry
7200s
Expire
604800s
Minimum TTL
600s
Nameservers (NS)
ns1049.ui-dns.biz
ns1115.ui-dns.com
ns1033.ui-dns.de
ns1084.ui-dns.org
SPF Record
✓ Strict (-all)
v=spf1 mx a -all
📊 DNS lookups: 2/10
✓ Hard fail (-all) — strict enforcement
DMARC Record
✓ Reject
v=DMARC1; p=reject; rua=mailto:[email protected]; ruf=mailto:[email protected];
✓ Reject — strongest protection
📋 SPF alignment: Relaxed
· DKIM alignment: Relaxed
📧 Reports → mailto:[email protected]
DKIM Selectors
✓ 2 found
default._domainkey
dkim._domainkey
✓ Public key: 392 chars (valid)
✓ DKIM properly configured for selector: default
Checked: google, selector1/2, default, mail, dkim, k1, s1/2, zoho, sendgrid, mxvault, amazonses
All TXT Records
1 record- SPFv=spf1 mx a -all
Full email verification for collective-zero.de
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