math.uni-bonn.de

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

Domain Overview

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

Checked via [email protected] · 2026-03-30 19:21:44 UTC · ↺ Refresh

MX Hostnames

  • esa3.rhrz.uni-bonn.de
  • esa2.rhrz.uni-bonn.de
  • esa1.rhrz.uni-bonn.de

MX Priorities

  • esa2.rhrz.uni-bonn.de: 100
  • esa3.rhrz.uni-bonn.de: 100
  • esa1.rhrz.uni-bonn.de: 100

A / AAAA Records

No A/AAAA records found.

Mail Server IPs

  • 131.220.18.242 ↩ esa2.rhrz.uni-bonn.de
  • 2a00:5ba0::102d:0:0:0:b ↩ esa2.rhrz.uni-bonn.de
  • 131.220.18.243 ↩ esa3.rhrz.uni-bonn.de
  • 2a00:5ba0::102e:0:0:0:c ↩ esa3.rhrz.uni-bonn.de
  • 131.220.18.241 ↩ esa1.rhrz.uni-bonn.de
  • 2a00:5ba0::102c:0:0:0:a ↩ esa1.rhrz.uni-bonn.de

SOA Record

Raw SOA rhein.math.uni-bonn.de support.math.uni-bonn.de 2026032701 1800 1800 2592000 300
Primary NS (mname)
rhein.math.uni-bonn.de
Admin Email (rname)
support@math.uni-bonn.de
Serial
2026032701
Refresh
1800s
Retry
1800s
Expire
2592000s
Minimum TTL
300s

Nameservers (NS)

dns1.uni-bonn.de
dns2.uni-bonn.de
dns3.uni-bonn.de
lahn.math.uni-bonn.de
mosel.math.uni-bonn.de
neckar.math.uni-bonn.de

SPF Record

✓ Strict (-all)
v=spf1 ip4:131.220.132.160/27 ip6:2a00:5ba0:20:67::/64 include:uni-bonn.de -all
📊 DNS lookups: 1/10
✓ Hard fail (-all) — strict 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

1 record
  • SPFv=spf1 ip4:131.220.132.160/27 ip6:2a00:5ba0:20:67::/64 include:uni-bonn.de -all
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