programmierbuecher.de

Valid Email Server
Domain Lookup › programmierbuecher.de

Domain Overview

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

Checked via [email protected] · 2026-03-30 22:03:42 UTC · ↺ Refresh

MX Hostnames

  • mail.programmierbuecher.de

MX Priorities

  • mail.programmierbuecher.de: 10

A / AAAA Records

  • 178.63.94.131 ↩ mail.programmierbuecher.de
  • 2a01:4f8:121:426c::2 ↩ mail.programmierbuecher.de

Mail Server IPs

  • 178.63.94.131 ↩ mail.programmierbuecher.de
  • 2a01:4f8:121:426c::2 ↩ mail.programmierbuecher.de

SOA Record

Raw SOA ns1.first-ns.de dns.hetzner.com 2023012300 14400 1800 604800 86400
Primary NS (mname)
ns1.first-ns.de
Admin Email (rname)
dns@hetzner.com
Serial
2023012300
Refresh
14400s
Retry
1800s
Expire
604800s
Minimum TTL
86400s

Nameservers (NS)

robotns2.second-ns.de
ns1.first-ns.de
robotns3.second-ns.com

SPF Record

✓ Strict (-all)
v=spf1 a mx a:www.gerd-gruber.de include:_spf.google.com -all
📊 DNS lookups: 4/10
✓ Hard fail (-all) — strict enforcement

DMARC Record

~ Quarantine
v=DMARC1; p=quarantine; sp=none; rua=mailto:[email protected]; ruf=mailto:[email protected]; rf=afrf; ri=86400
~ Quarantine — good protection (failing mail goes to spam)
📋 SPF alignment: Relaxed · DKIM alignment: Relaxed
📧 Reports → mailto:[email protected]
↳ Subdomain policy: none

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 mx a:www.gerd-gruber.de include:_spf.google.com -all
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