streng.de

Valid Email Server
Domain Lookup › streng.de

Domain Overview

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

Checked via [email protected] · 2026-04-01 15:59:52 UTC · ↺ Refresh

MX Hostnames

  • mail.streng.de

MX Priorities

  • mail.streng.de: 10

A / AAAA Records

  • 212.204.121.2 ↩ host-212-204-121-2.customer.m-online.net

Mail Server IPs

  • 212.204.89.55 ↩ mail.streng.de

SOA Record

Raw SOA ns1.m-online.net hostmaster.m-net.de 2022101801 3600 1800 3600000 600
Primary NS (mname)
ns1.m-online.net
Admin Email (rname)
hostmaster@m-net.de
Serial
2022101801
Refresh
3600s
Retry
1800s
Expire
3600000s
Minimum TTL
600s

Nameservers (NS)

ns1.m-online.net
ns2.m-online.net
ns4.m-online.net
ns3.m-online.net

SPF Record

✓ Strict (-all)
v=spf1 a mx include:spf.m-online.net -all
📊 DNS lookups: 3/10
✓ Hard fail (-all) — strict enforcement

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

2 records
  • MS=ms36608154
  • SPFv=spf1 a mx include:spf.m-online.net -all
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