sertek.de

Valid Email Server
Domain Lookup › sertek.de

Domain Overview

DNS: ✓ 2mo ago Checker: ✓ 2mo ago
sertek.de
Yes
✓ Yes
Unknown
No
No
⚠ Yes
No
No
Did you mean: [email protected]

Checked via [email protected] · 2026-03-25 16:41:35 UTC · ↺ Refresh

MX Hostnames

  • rrmx.imp.ch

MX Priorities

  • rrmx.imp.ch: 10

A / AAAA Records

  • 157.161.137.131 ↩ www.sertek.de

Mail Server IPs

  • 157.161.12.4 ↩ asterix.imp.ch
  • 157.161.12.5 ↩ obelix.imp.ch
  • 157.161.12.6 ↩ idefix.imp.ch
  • 2001:4060:1:1001::12:6 ↩ idefix.imp.ch
  • 2001:4060:1:1001::12:4 ↩ asterix.imp.ch
  • 2001:4060:1:1001::12:5 ↩ obelix.imp.ch

SOA Record

Raw SOA ns1.imp.ch noc.imp.ch 2603180001 300 300 1209600 300
Primary NS (mname)
ns1.imp.ch
Admin Email (rname)
noc@imp.ch
Serial
2603180001
Refresh
300s
Retry
300s
Expire
1209600s
Minimum TTL
300s

Nameservers (NS)

ns2.imp.ch
ns1.imp.ch

SPF Record

✗ Missing

No SPF record — domain is unprotected against spoofing.

⚠ No SPF record found. Email servers cannot verify authorized senders.

DMARC Record

✗ Missing

No DMARC record — emails cannot be rejected on auth failure.

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

No TXT records found.

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