Rank #7,454Updated November 10, 2026
zum.de
Zentrale für Unterrichtsmedien im Internet e.V.
The site runs on WordPress, Matomo, WP Super Cache and 8 other technologies. Its email security grade is D. Its SSL certificate is issued by Let's Encrypt and is valid for 40 more days.
- Domain age
- —
- Technologies
- 11
- Email security
- D
- SSL days left
- 40
DNS records
| Type | Value | TTL |
|---|---|---|
| A | 144.76.182.232 | 60 |
| MX | mail.zum.de 5 | 300 |
| NS | buck.ns.cloudflare.com | 86400 |
| NS | vita.ns.cloudflare.com | 86400 |
| TXT | _acme-challenge.zum.de=tvGkjf0_KK1Jku6woc6eYyH7UluTc9gg5HKU3JFcUiY | 7200 |
| TXT | v=spf1 mx ip4:46.4.65.203/32 ip4:88.99.253.153/32 ip4:116.202.233.184/32 ip4:168.119.145.97/32 ip6:2a01:4f8:251:85d::2 ip4:176.9.48.202 ip6:2a01:4f8:150:64c5::2 -all | 7200 |
| AAAA | 2a01:4f8:200:60b5::2 | 60 |
Technology stack
Analytics
Cache
CMS
Cookie consent
Email marketing
Fonts
JavaScript library
Programming language
Web server
SSL certificate
| Valid | Valid |
|---|---|
| Issuer | US, YR1, Let's Encrypt |
| Expires | December 20, 2026 |
| Days remaining | 40 |
| Protocol | TLSv1.3 |
| Names | www.zum.de, zum.de |
Email security
DScore 59/100 across SPF, DMARC, DKIM, MTA-STS and BIMI.
- warnDMARC policy is none (monitoring only). Spoofed mail is still delivered.
- warnDMARC has no rua= address, so you receive no reports about mail sent as your domain.
- warnNo MTA-STS: mail sent to you can be downgraded to an unencrypted connection.
- warnNo TLS-RPT record, so you won't hear about failed encrypted deliveries.
- warnNo BIMI record (optional: shows your logo next to your emails in supporting inboxes).
- goodSPF record found.
- goodSPF ends with -all: servers you have not listed are rejected (hard fail).
- goodDKIM keys found (selector: mail, dkim).
- good1 MX record(s) found.
Homepage metadata
| Title | Zentrale für Unterrichtsmedien im Internet e.V. |
|---|---|
| Language | de |
| Canonical | https://www.zum.de/portal/ |
| Indexable | Yes |
| Word count | 732 |
About zum.de
What technology does zum.de use?
We detected 11 technologies on zum.de, including Matomo, WP Super Cache, WordPress, Complianz, Mailchimp, Font Awesome.
Does zum.de protect its email with SPF and DMARC?
zum.de scores 59/100 (grade D) for email security. DMARC policy is none (monitoring only). Spoofed mail is still delivered. DMARC has no rua= address, so you receive no reports about mail sent as your domain.
What are the name servers of zum.de?
zum.de uses buck.ns.cloudflare.com, vita.ns.cloudflare.com.