Domain Overview
DNS: ✓ 2mo ago
Checker: ✓ 2mo ago
bielefeld.de
Yes
✓ Yes
Unknown
No
No
⚠ Yes
No
No
Checked via [email protected]
· 2026-03-19 13:41:47 UTC · ↺ Refresh
MX Hostnames
- mail.fsp-bielefeld.de
MX Priorities
- mail.fsp-bielefeld.de: 5
A / AAAA Records
- 193.22.251.15 ↩ beryllium.duesseldorf.rz-betrieb.de
Mail Server IPs
- 91.194.108.54 ↩ mail06.fsp-bielefeld.de
- 91.194.108.55 ↩ mail07.fsp-bielefeld.de
- 91.194.108.56 ↩ mail08.fsp-bielefeld.de
SOA Record
Raw SOA
ns1.duesseldorf.rz-betrieb.de hostmaster.duesseldorf.rz-betrieb.de 2026031800 10800 3600 604800 86400
Primary NS (mname)
ns1.duesseldorf.rz-betrieb.de
Admin Email (rname)
hostmaster@duesseldorf.rz-betrieb.de
Serial
2026031800
Refresh
10800s
Retry
3600s
Expire
604800s
Minimum TTL
86400s
Nameservers (NS)
secondary004.dtag.net
pns.dtag.de
SPF Record
✓ Strict (-all)
v=spf1 include:fsp-bielefeld.de include:spf2.bielefeld.de ip4:193.22.251.0/24 ip4:80.66.4.12 ip4:80.66.4.19 ip4:78.46.4.219 ip4:52.157.149.216 -all
📊 DNS lookups: 2/10
✓ Hard fail (-all) — strict enforcement
DMARC Record
~ Quarantine
v=DMARC1; p=quarantine; rua=mailto:[email protected];
~ Quarantine — good protection (failing mail goes to spam)
📋 SPF alignment: Relaxed
· DKIM alignment: Relaxed
📧 Reports → mailto:[email protected]
DKIM Selectors
✗ None detectedNo 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
5 records- google-site-verification=Rp8-jIByKcImGQMJ55CsYHC1W7ZElQh6S1tcyglRvYg
- swisssign-check=NuPWw-TIzqE5SvjYNz9alh4CMNI
- SPFv=spf1 include:fsp-bielefeld.de include:spf2.bielefeld.de ip4:193.22.251.0/24 ip4:80.66.4.12 ip4:80.66.4.19 ip4:78.46.4.219 ip4:52.157.149.216 -all
- ZOOM_verify_a18nmIWnQcaTrKbE6kmvHg
- MS=ms40652356
Full email verification for bielefeld.de
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