bit.uni-bonn.de

Valid Email Server
Domain Lookup › bit.uni-bonn.de

Domain Overview

DNS: ✓ 2mo ago Checker: ✓ 2mo ago
bit.uni-bonn.de
Yes
✓ Yes
Unknown
No
No
⚠ Yes
No
No
Did you mean: [email protected]

Checked via [email protected] · 2026-03-31 23:36:14 UTC · ↺ Refresh

MX Hostnames

  • halls-of-waiting-mx.iai.uni-bonn.de
  • mandos-mx.iai.uni-bonn.de

MX Priorities

  • halls-of-waiting-mx.iai.uni-bonn.de: 2
  • mandos-mx.iai.uni-bonn.de: 1

A / AAAA Records

  • 131.220.148.70 ↩ ad3.bit.uni-bonn.de
  • 131.220.148.66 ↩ ad1.bit.uni-bonn.de

Mail Server IPs

  • 131.220.8.22 ↩ halls-of-waiting.iai.uni-bonn.de
  • 131.220.63.193 ↩ mx8.iai.uni-bonn.de

SOA Record

Raw SOA isis.informatik.uni-bonn.de gsg.informatik.uni-bonn.de 2026032700 3600 1800 1209600 3600
Primary NS (mname)
isis.informatik.uni-bonn.de
Admin Email (rname)
gsg@informatik.uni-bonn.de
Serial
2026032700
Refresh
3600s
Retry
1800s
Expire
1209600s
Minimum TTL
3600s

Nameservers (NS)

schultze.informatik.uni-bonn.de
dns2.uni-bonn.de
dns3.uni-bonn.de
dns1.uni-bonn.de
schulze.informatik.uni-bonn.de

SPF Record

✓ Soft Fail (~all)
v=spf1 -ip4:131.220.8.144/28 +ip4:131.220.8.0/27 +ip4:131.220.10.0/27 +ip4:131.220.63.192/28 ~all
📊 DNS lookups: 0/10
~ Soft fail (~all) — moderate enforcement

DMARC Record

✗ Missing

No DMARC record — emails cannot be rejected on auth failure.

DKIM Selectors

✗ None detected

No DKIM records found for common selectors — your provider may use a custom selector name.

Checked: google, selector1/2, default, mail, dkim, k1, s1/2, zoho, sendgrid, mxvault, amazonses

All TXT Records

3 records
  • Bonn-Aachen International Center for Information Technology
  • SPFv=spf1 -ip4:131.220.8.144/28 +ip4:131.220.8.0/27 +ip4:131.220.10.0/27 +ip4:131.220.63.192/28 ~all
  • v=spf2/pra -ip4:131.220.8.144/28 +ip4:131.220.8.0/27 +ip4:131.220.10.0/27 +ip4:131.220.63.192/28 ~all
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