Recon Report
mailbox.org
Target Assessment
Target Hardness:
Hardened
8 defensive layers
|
1 attack surface gaps
1 monitoring
ANALYSIS CONFIDENCE
MODERATE
63/100
ACC:56%
CUR:71
MAT:gold
Email Spoofability Can you spoof email from this domain? No SPF and DMARC reject policy enforced
> analyzing sender authorization policy...
SPF — Sender Policy Framework
SPF is configured — sender authorization restricts spoofing
RFC 7208 — Sender Policy Framework
SPF allows domain owners to specify which mail servers are authorized to send email on behalf of their domain. Without SPF, any server can forge the envelope sender.
> enumerating cryptographic selectors...
DKIM — DomainKeys Identified Mail
DKIM selectors reveal mail infrastructure
— limited discovery
RFC 6376 — DomainKeys Identified Mail
DKIM provides cryptographic authentication of email messages. Selector names often reveal email providers (e.g., google, selector1 = Microsoft 365).
> evaluating enforcement policy...
DMARC — Domain-based Message Authentication
DMARC p=reject — hard enforcement. Spoofing will be rejected.
RFC 7489 — DMARC
DMARC ties SPF and DKIM together with a policy that tells receiving servers what to do with unauthenticated mail. p=none is monitoring only — attackers love it.
Transport Security Can you intercept email in transit? Yes Both MTA-STS and DANE enforce encrypted mail delivery
> probing certificate pinning via DNSSEC chain...
DANE / TLSA
DANE TLSA records pin certificates via DNSSEC — MITM requires compromising the DNS chain
MTA-STS
MTA-STS enforce mode — senders required to use TLS
TLS-RPT
TLS-RPT configured — TLS failures are reported to the domain owner
RFC 8460 — SMTP TLS Reporting
TLS-RPT enables reporting of TLS negotiation failures. Without it, STARTTLS downgrade attacks leave no trace.
Brand & Certificate Security Can you fake this brand's identity? Possible DMARC reject policy blocks email spoofing (RFC 7489 §6.3) and CAA restricts certificate issuance (RFC 8659 §4), but no BIMI brand verification — lookalike domains display identically in inboxes without visual proof of authenticity
BIMI
No BIMI — no verified brand logo in email clients. Visual impersonation is easy.
CAA — Certificate Authority Authorization
CAA restricts certificate issuance to authorized CAs. Attacker must compromise an approved CA or exploit issuance delay windows.
0 iodef "mailto:security@heinlein-support.de"
0 issue "letsencrypt.org"
0 iodef "mailto:mail@heinlein-support.de"
0 issue "swisssign.com"
0 issue "digicert.com"
RFC 8659 — CAA
CAA records specify which Certificate Authorities are authorized to issue certificates. Without CAA, an attacker could obtain a valid cert from any CA.
DNS Infrastructure Can you poison the DNS? No DNSSEC signed; a validating resolver confirmed the cryptographic chain of trust via the AD flag (RFC 4035 §3.2.3)
> validating cryptographic chain of trust...
DNSSEC
DNSSEC validated — DNS responses are cryptographically signed
RFC 4033–4035 — DNSSEC
DNSSEC adds cryptographic signatures to DNS responses, preventing cache poisoning and response forgery. Without DNSSEC, an attacker can forge DNS answers.
NS Delegation
5 nameservers detected
dns3.cloudns.net
dns4.cloudns.net
ns.jpberlin.de
ns2.jpberlin.de
ns3.jpberlin.de
Attack Surface Discovery What can you find from the outside?
Subdomain Discovery (Multi-Source)
0 subdomains discovered via CT logs + DNS probing + Nmap SAN extraction
| Subdomain |
|---|
map[cert_count:1 cname_target:keycloak.heinlein-support.de first_seen:2026-05-18 is_current:true issuers:[] name:account.mailbox.org source:dns] |
map[cert_count:1 first_seen:2026-05-18 is_current:true issuers:[] name:api.mailbox.org source:dns] |
map[cert_count:— first_seen:— is_current:true issuers:[] name:app-share.mailbox.org source:external_tools] |
map[cert_count:1 first_seen:2026-05-18 is_current:true issuers:[] name:app.mailbox.org source:dns] |
map[cert_count:2 first_seen:2026-06-05T10:39:57Z is_current:true issuers:[] name:archive-staging.mailbox.org source:ct] |
map[cert_count:1 first_seen:2025-12-19T00:00:00Z is_current:true issuers:[] name:archive.mailbox.org source:ct] |
map[cert_count:1 cname_target:traefik.mailbox.org first_seen:2026-05-18 is_current:true issuers:[] name:auth.mailbox.org source:dns] |
map[cert_count:— first_seen:— is_current:true issuers:[] name:auto.mailbox.org source:external_tools] |
map[cert_count:1 cname_target:auto.mailbox.org first_seen:2026-05-18 is_current:true issuers:[] name:autoconfig.mailbox.org source:dns] |
map[cert_count:1 cname_target:auto.mailbox.org first_seen:2026-05-18 is_current:true issuers:[] name:autodiscover.mailbox.org source:dns] |
map[cert_count:2 first_seen:2026-04-10T13:07:39Z is_current:true issuers:[] name:avatar.opentalk.mailbox.org source:ct] |
map[cert_count:— first_seen:— is_current:true issuers:[] name:betatest.mailbox.org source:external_tools] |
map[cert_count:— first_seen:— is_current:true issuers:[] name:businessadmin.mailbox.org source:external_tools] |
map[cert_count:1 first_seen:2026-05-18 is_current:true issuers:[] name:chat.mailbox.org source:dns] |
map[cert_count:1 first_seen:2026-05-18 is_current:true issuers:[] name:conference.mailbox.org source:dns] |
map[cert_count:1 first_seen:2026-05-18 is_current:true issuers:[] name:console.mailbox.org source:dns] |
map[cert_count:1 first_seen:2025-10-27T00:00:00Z is_current:true issuers:[] name:controller.opentalk-staging.mailbox.org source:ct] |
map[cert_count:1 first_seen:2026-04-28T23:28:44Z is_current:true issuers:[] name:controller.opentalk.mailbox.org source:ct] |
map[cert_count:— first_seen:— is_current:true issuers:[] name:converse.mailbox.org source:external_tools] |
map[cert_count:— first_seen:— is_current:true issuers:[] name:dav-bl.mailbox.org source:external_tools] |
SaaS Services (TXT Record Discovery)
2 SaaS services detected via DNS TXT verification records
Google
Have I Been Pwned
Secret Exposure
No exposed secrets detected in common paths
Intelligence Metadata Can you verify this independently?
SHA-3-512 Integrity Hash
d31c44ac80ce9a205a338665e89620395d00aad402b7fd17b6b3362d2c696e0950c1d60962ce3cae5db6da47d7cd25e5223f584cdf08fef1b7a910b59e27ac27
RFC References
12
Tool Version
v26.50.01
Posture Hash
e0d293fdde3c3277…