second-first.de

Valid Email Server
Domain Lookup › second-first.de

Domain Overview

DNS: ✓ 2mo ago Checker: ✓ 2mo ago
second-first.de
Yes
✓ Yes
Unknown
No
No
⚠ Yes
No
No

Checked via [email protected] · 2026-03-19 00:43:00 UTC · ↺ Refresh

MX Hostnames

  • mx00.ionos.de
  • mx01.ionos.de

MX Priorities

  • mx01.ionos.de: 10
  • mx00.ionos.de: 10

A / AAAA Records

  • 217.160.0.50 ↩ 217-160-0-50.elastic-ssl.ui-r.com
  • 2001:8d8:100f:f000::269 ↩ 2001-08d8-100f-f000-0000-0000-0000-0269.elastic-ssl.ui-r.com

Mail Server IPs

  • 217.72.192.67 ↩ mx01.kundenserver.de
  • 212.227.15.41 ↩ mx00.kundenserver.de

SOA Record

Raw SOA ns1089.ui-dns.com hostmaster.1und1.de 2015111125 28800 7200 604800 300
Primary NS (mname)
ns1089.ui-dns.com
Admin Email (rname)
hostmaster@1und1.de
Serial
2015111125
Refresh
28800s
Retry
7200s
Expire
604800s
Minimum TTL
300s

Nameservers (NS)

ns1089.ui-dns.de
ns1089.ui-dns.org
ns1089.ui-dns.biz
ns1089.ui-dns.com

SPF Record

✓ Soft Fail (~all)
v=spf1 include:_spf-eu.ionos.com ~all
📊 DNS lookups: 1/10
~ Soft fail (~all) — moderate enforcement

DMARC Record

✗ p=none
v=DMARC1; p=none;
⚠ p=none — monitoring only, no enforcement
📋 SPF alignment: Relaxed · DKIM alignment: Relaxed
⚠ No aggregate reports (rua= not set)

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 include:_spf-eu.ionos.com ~all
Free · No signup required
Add email validation to your forms

Block disposable emails, validate MX records, detect role accounts — unlimited, forever free.

<script src="https://check.verifyswift.com/"></script>
One line of code · Works on any site
See demo & docs
Deep verification
Full email verification for second-first.de

SMTP handshake, catch-all detection, SPF/DKIM/DMARC analysis, and Yahoo/Outlook verification.

Get 1,000 Free Credits