tu-ilmenau.de

Delegation · The addresses at the parent (glue) differ from the addresses in the zone: prakinf2.prakinf.tu-ilmenau.de (glue 141.24.12.2, zone 141.24.12.2, 2001:638:904:1020::2). Update the glue at your registrar.

DNSSEC · The zone is not signed with DNSSEC, so answers can be spoofed. Enable DNSSEC at your DNS provider and publish the DS record at your registrar.

DMARC · DMARC policy is set to 'quarantine'. Consider upgrading to 'reject' for stronger protection once you've verified legitimate emails are passing authentication.

DKIM · The _domainkey name exists but no DKIM key was found under the common selectors. Selectors are provider-specific; check yours with -selector.

DNSSEC · DNSSEC is not enabled for this domain. Consider enabling DNSSEC to protect against DNS spoofing attacks.

MX · The following MX hosts could not be resolved to IPv6 addresses: a2221.mx.srv.dfn.de, b2221.mx.srv.dfn.de, c2221.mx.srv.dfn.de, mail-router1.rz.tu-ilmenau.de, mail-router2.rz.tu-ilmenau.de, mail.tu-ilmenau.de

MX · Found 6 MX records, which is more than the recommended maximum of 5. Too many MX records may indicate a misconfiguration.

DMARC · DMARC policy only applies to 1% of failing mail (pct=1). Raise pct to 100 once you are confident in your setup.

TLS · MTA-STS is not configured, so other mail servers fall back to unencrypted delivery when TLS fails or is stripped by an attacker. Publish a _mta-sts TXT record and a policy at https://mta-sts.<domain>/.well-known/mta-sts.txt.

TLS · MTA-STS or DANE is used without TLS-RPT, so you get no reports when senders fail to deliver because of TLS problems. Publish _smtp._tls TXT "v=TLSRPTv1; rua=mailto:...".

TLS · These MX hosts publish no TLSA records, so mail to them is not protected by DANE: mail-router1.rz.tu-ilmenau.de, mail-router2.rz.tu-ilmenau.de, mail.tu-ilmenau.de.