siebert.de

Valid Email Server
Domain Lookup › siebert.de

Domain Overview

DNS: ✓ 2mo ago Checker: ✓ 2mo ago
siebert.de
Yes
✓ Yes
Unknown
No
No
⚠ Yes
No
No

Checked via [email protected] · 2026-03-30 23:31:11 UTC · ↺ Refresh

MX Hostnames

  • proxmox.siebert-group.com

MX Priorities

  • proxmox.siebert-group.com: 10

A / AAAA Records

  • 89.31.143.90 (no PTR)

Mail Server IPs

  • 213.135.7.75 ↩ mail-gw.siebert-group.com

SOA Record

Raw SOA ns.udag.de hostmaster.united-domains.de 2023120202 10800 3600 604800 3600
Primary NS (mname)
ns.udag.de
Admin Email (rname)
hostmaster@united-domains.de
Serial
2023120202
Refresh
10800s
Retry
3600s
Expire
604800s
Minimum TTL
3600s

Nameservers (NS)

ns.udag.net
ns.udag.org
ns.udag.de

SPF Record

✓ Strict (-all)
v=spf1 a:mail.siebert-group.com a:vm-kas-smgw.eppelborn.siebert-group.com a:mail-gw.siebert-group.com ip4:213.135.7.76 ip4:213.135.7.75 -all
📊 DNS lookups: 3/10
✓ Hard fail (-all) — strict enforcement

DMARC Record

✓ Reject
v=DMARC1; p=reject; sp=reject; pct=100; aspf=s;
✓ Reject — strongest protection
📋 SPF alignment: Strict · DKIM alignment: Relaxed
⚠ No aggregate reports (rua= not set)
↳ Subdomain policy: reject

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

1 record
  • SPFv=spf1 a:mail.siebert-group.com a:vm-kas-smgw.eppelborn.siebert-group.com a:mail-gw.siebert-group.com ip4:213.135.7.76 ip4:213.135.7.75 -all
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