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88
Total
85
DNS
90
Email
81
Security
85
Network
100
Availability
Domainheise.de
IPv41
IPv61
MX records4
StatusActive
Domain technical report

heise online - IT-News, Nachrichten und Hintergründe | heise online

heise.de

News und Foren zu Computer, IT, Wissenschaft, Medien und Politik. Preisvergleich von Hardware und Software sowie Downloads bei Heise Medien.

Generated: 2026-08-08T19:24:09-05:00 · Cached result

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IPv41
IPv61
MX4
NS5

DiagnosticsMain findings and recommendations

✓
IPv4 (A)30 / 30 pts · Dns

1 IPv4 address(es) detected.

✓
IPv6 (AAAA)10 / 10 pts · Dns

1 IPv6 address(es) detected.

✓
Name server redundancy20 / 20 pts · Dns

5 NS record(s); 2 or more required.

✓
SOA record10 / 10 pts · Dns

Authoritative zone record.

!
DNSSEC chain0 / 15 pts · Dns

Both DS and DNSKEY are required.

✓
CAA policy5 / 5 pts · Dns

Certificate authority restriction.

✓
DNS propagation10 / 10 pts · Dns

Agreement between public resolvers.

✓
MX records20 / 20 pts · Mail

4 MX record(s).

✓
SPF25 / 25 pts · Mail

SPF policy published.

✓
DMARC25 / 25 pts · Mail

DMARC policy published.

✓
DKIM20 / 20 pts · Mail

A DKIM selector was verified.

!
MTA-STS0 / 5 pts · Mail

Mail transport policy.

!
TLS-RPT0 / 5 pts · Mail

TLS reporting policy.

✓
Valid TLS certificate55 / 55 pts · Security

54 day(s) remaining.

✓
Certificate lifetime10 / 10 pts · Security

Full points require at least 30 days remaining.

i
HTTP security headers16 / 35 pts · Security

4 of 9 evaluated headers detected.

✓
PTR reverse DNS30 / 30 pts · Network

PTR: redirector.heise.de

i
IPv4 diversity20 / 35 pts · Network

Two or more IPv4 addresses receive full points.

✓
IPv6 connectivity35 / 35 pts · Network

AAAA availability.

✓
DNS resolution40 / 40 pts · Availability

At least one address family must resolve.

✓
HTTP response40 / 40 pts · Availability

HTTP/2 200

✓
HTTPS final URL20 / 20 pts · Availability

Final URL uses HTTPS.

DNS and emailPublished records and email configuration

A

1 record(s)
193.99.144.80

AAAA

1 record(s)
2a02:2e0:3fe:1001:302::

CNAME

0 record(s)
—

Not configured

MX

4 record(s)
30 mx03.hornetsecurity.com.
40 mx04.hornetsecurity.com.
10 mx01.hornetsecurity.com.
20 mx02.hornetsecurity.com.

TXT

11 record(s)
"docusign=b14b0107-39e4-44c2-b48f-944859786474"
"miro-verification=601d1e3e9623fe2102de9d6d215a2380ae5c69bd"
"c3ViZG9tYWlu"
"google-site-verification=7CvE9FRS3zv0wnl8KzLmVw0TSlQay6qOX_zGFm2wzWw"
"kT2+bTXGMSIudHQATflucV7vjLhdq9Y18pKTKJxs0O2IebE8seBu4vCAe9MBHYehuRJWwKKt1klytxF4vyuSpA=="
"brevo-code:3022b29c6069a0b2ab4ad1eae06d06df"
"apple-domain-verification=m53iQZB4O1uMxDGR"
"google-site-verification=8kcKAZp-IbbJG7FQzRxIaUXv9Ku4qX0wgMrm_hx_L2s"
"tollbit-domain-verification=6fd594c990db1742b6cb34f3699d3944885e664c32333cf8cb176da9aac3ab71"
"wUIdRqARf1uNkZkPoWGdYvEmK408vvKC3HKme1h/rnswYDphj9Ytgwt6K1Df1PQnW64Oi3t9c9uKoo989wv8xw=="
"v=spf1 ip4:193.99.144.0/24 ip4:193.99.145.0/24 ip6:2a02:2e0:3fe:1001::/64 ip6:2a00:e68:14:800::/64 ip4:193.100.232.56 ip6:2a00:e68:14:801:bad::beef include:_spfdiv.heise.de include:spf.dsb.net include:spf.hornetsecurity.com ~all"

NS

5 record(s)
ns.pop-hannover.de.
ns.heise.de.
ns.plusline.de.
ns.s.plusline.de.
ns2.pop-hannover.net.

SOA

1 record(s)
ns.heise.de. hostmaster.heise.de. 2026080902 14400 3600 604800 86400

CAA

6 record(s)
0 iodef "mailto:hostmaster@heise.de"
0 issuewild "sectigo.com"
0 issue "amazon.com"
0 issue "sectigo.com"
0 issue "letsencrypt.org"
0 issue "digicert.com"

DS

0 record(s)
—

Not configured

DNSKEY

0 record(s)
—

Not configured

RRSIG

0 record(s)
—

Not configured

NSEC

0 record(s)
—

Not configured

NSEC3

0 record(s)
—

Not configured

SRV

0 record(s)
—

Not configured

NAPTR

0 record(s)
—

Not configured

TLSA

0 record(s)
—

Not configured

SSHFP

0 record(s)
—

Not configured

SPF

Configured
v=spf1 ip4:193.99.144.0/24 ip4:193.99.145.0/24 ip6:2a02:2e0:3fe:1001::/64 ip6:2a00:e68:14:800::/64 ip4:193.100.232.56 ip6:2a00:e68:14:801:bad::beef include:_spfdiv.heise.de include:spf.dsb.net include:spf.hornetsecurity.com ~all

DMARC

Configured
v=DMARC1; p=none; sp=none; rua=mailto:dmarc.report@heise.de

DKIM

Selector mail
k=rsa;p=MIGfMA0GCSqGSIb3DQEBAQUAA4GNADCBiQKBgQDeMVIzrCa3T14JsNY0IRv5/2V1/v2itlviLQBwXsa7shBD6TrBkswsFUToPyMRWC9tbR/5ey0nRBH0ZVxp+lsmTxid2Y2z+FApQ6ra2VsXfbJP3HE6wAO0YTVEJt1TmeczhEd2Jiz/fcabIISgXEdSpTYJhb0ct0VJRxcg4c8c7wIDAQAB

Analyzed webpageMetadata and HTTP response

Title and description

Extracted
Title
heise online - IT-News, Nachrichten und Hintergründe | heise online
Description
News und Foren zu Computer, IT, Wissenschaft, Medien und Politik. Preisvergleich von Hardware und Software sowie Downloads bei Heise Medien.
Final URL
https://www.heise.de/
HTTP status
206

HTTP

Status
HTTP/2 200
Final URL
https://www.heise.de/
Version
3
Server
nginx
X-Powered-By

SSL and HTTP securityCertificate, protocol and security headers

SSL certificate

Available
Available
Yes
Issuer
Let's Encrypt
CN
heise.de
Valid from
2026-07-04T11:57:50-05:00
Valid until
2026-10-02T11:57:49-05:00
Days remaining
54
Protocol
TLSv1.3
Cipher
TLS_AES_256_GCM_SHA384

Security headers

4 active
✓
HSTSImplemented
—
Content Security PolicyNot detected
✓
X-Content-Type-OptionsImplemented
✓
X-Frame-OptionsImplemented
—
Referrer PolicyNot detected
—
Permissions PolicyNot detected
✓
Cross-Origin-Opener-PolicyImplemented
—
Cross-Origin-Embedder-PolicyNot detected
—
Cross-Origin-Resource-PolicyNot detected

DNS propagationComparison across public resolvers

Public resolver comparison

Consistent
✓
Consistent propagation

5 public resolvers queried.

ResolverServerResultLatency
Google
8.8.8.8
193.99.144.80
31,02 ms
Cloudflare
1.1.1.1
193.99.144.80
146,04 ms
Quad9
9.9.9.9
193.99.144.80
156,29 ms
OpenDNS
208.67.222.222
193.99.144.80
27,76 ms
AdGuard
94.140.14.14
193.99.144.80
41,02 ms

IP, geolocation and ASNAssociated network information

193.99.144.80

No data
success
No
country
region
city
asn
organization
isp

Visitor information

Visitor
ip
216.73.217.62
reverse
country
country_code
region
city
latitude
longitude
isp
organization
asn
timezone
browser
Other
os
Other
language
user_agent
Mozilla/5.0 AppleWebKit/537.36 (KHTML, like Gecko; compatible; ClaudeBot/1.0; +claudebot@anthropic.com)
is_bot
Yes
cloudflare
No

SMTPEmail port connectivity

mx03.hornetsecurity.com

Port 25: Closed/unreachable - 3.4 ms - 
Port 465: Closed/unreachable - 4020.6 ms - 
Port 587: Closed/unreachable - 107.1 ms - 220 mx-gate47-hz3.hornetsecurity.com

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