Domain Overview
DNS: ✓ 2mo ago
Checker: ✓ 2mo ago
1blu.de
Yes
✓ Yes
Unknown
No
No
⚠ Yes
No
No
Did you mean: [email protected]
Checked via [email protected]
· 2026-03-20 23:17:33 UTC · ↺ Refresh
MX Hostnames
- mail.1blu.de
MX Priorities
- mail.1blu.de: 10
A / AAAA Records
- 178.254.4.208 (no PTR)
Mail Server IPs
- 178.254.16.131 ↩ mail.1blu.de
SOA Record
Raw SOA
ns1.1blu-dns.de hostmaster.1blu.de 2026031701 14400 3600 604800 180
Primary NS (mname)
ns1.1blu-dns.de
Admin Email (rname)
hostmaster@1blu.de
Serial
2026031701
Refresh
14400s
Retry
3600s
Expire
604800s
Minimum TTL
180s
Nameservers (NS)
ns1.1blu-dns.de
ns2.1blu-dns.eu
ns3.1blu-dns.net
SPF Record
✓ Soft Fail (~all)
v=spf1 mx include:_spf.mailrelay.rrpproxy.net include:spf.crowdtech.com ~all
📊 DNS lookups: 3/10
~ Soft fail (~all) — moderate enforcement
DMARC Record
~ Quarantine
v=DMARC1; p=quarantine; rua=mailto:[email protected]; fo=1; adkim=s; sp=none;
~ Quarantine — good protection (failing mail goes to spam)
📋 SPF alignment: Relaxed
· DKIM alignment: Strict
📧 Reports → mailto:[email protected]
↳ Subdomain policy: none
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
2 records- google-site-verification=YB1n7Xwjh3GkBrW5Q1lq9pZCUH7CDHFIGSrW-pbcvoI
- SPFv=spf1 mx include:_spf.mailrelay.rrpproxy.net include:spf.crowdtech.com ~all
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