binary-butterfly.de

Valid Email Server
Domain Lookup › binary-butterfly.de

Domain Overview

DNS: ✓ 2mo ago Checker: ✓ 2mo ago
binary-butterfly.de
Yes
✓ Yes
Unknown
No
No
⚠ Yes
No
No

Checked via [email protected] · 2026-03-24 13:52:47 UTC · ↺ Refresh

MX Hostnames

  • letterbox-online.de

MX Priorities

  • letterbox-online.de: 10

A / AAAA Records

  • 157.90.134.52 ↩ web-1.sectio-aurea.org
  • 2a01:4f8:252:298b::2 ↩ web-1.sectio-aurea.org

Mail Server IPs

  • 78.46.107.83 ↩ letterbox-online.de
  • 2a01:4f8:121:4d2::2 ↩ letterbox-online.de

SOA Record

Raw SOA root-dns.netcup.net dnsadmin.netcup.net 2025060236 28800 7200 1209600 86400
Primary NS (mname)
root-dns.netcup.net
Admin Email (rname)
dnsadmin@netcup.net
Serial
2025060236
Refresh
28800s
Retry
7200s
Expire
1209600s
Minimum TTL
86400s

Nameservers (NS)

root-dns.netcup.net
second-dns.netcup.net
third-dns.netcup.net

SPF Record

✓ Soft Fail (~all)
v=spf1 include:letterbox-online.de ~all
📊 DNS lookups: 1/10
~ Soft fail (~all) — moderate enforcement

DMARC Record

~ Quarantine
v=DMARC1;p=quarantine;sp=quarantine;adkim=s;aspf=r;ruf=mailto:[email protected]
~ Quarantine — good protection (failing mail goes to spam)
📋 SPF alignment: Relaxed · DKIM alignment: Strict
⚠ No aggregate reports (rua= not set)
↳ Subdomain policy: quarantine

DKIM Selectors

✗ None detected

No 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

3 records
  • SPFv=spf1 include:letterbox-online.de ~all
  • google-site-verification=NPvsPW08A3gDxicwFMmizzak5w11M2s3j9yaJWKfSMk
  • jetbrains-domain-verification=8w5r8p4c9kl9xaxdyu20t8a5u
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