rsm.tu-darmstadt.de

Email infrastructure report · Last checked 28 Jul 2026, 17:59 UTC

Summary

rsm.tu-darmstadt.de uses Self-hosted / Custom for email and has SPF and DKIM configured. It is not catch-all.

Mail provider

ProviderSelf-hosted / Custom self-hosted

Primary MXa2681.mx.srv.dfn.de

MX records

Priority	Hostname	IPs
10	a2681.mx.srv.dfn.de	194.95.233.42, 2001:638:d:c301:acdc:1979:2:e2
10	c2681.mx.srv.dfn.de	194.95.239.42, 2001:638:d:c303:acdc:1979:2:e2
10	b2681.mx.srv.dfn.de	194.95.235.42, 2001:638:d:c302:acdc:1979:2:e2

Authentication

SPF✓ Present ?all

DKIM✓ Found (selectors: s1)

DMARC✗ Missing

Raw SPF record

v=spf1 include:_spf.tu-darmstadt.de ?all

Email behavior

Catch-all✗ No

Disposable✗ No

Free provider✗ No

STARTTLS✓ Supported

SMTP response79ms

SMTP banner220 a2681.mx.srv.dfn.de ESMTP Postfix

What this means

This domain is missing DMARC, which weakens its protection against email spoofing. Adding this record would improve deliverability and reduce the risk of impersonation.

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