Domain Overview
DNS: ✓ 2mo ago
Checker: ✓ 2mo ago
aon.de
Yes
✓ Yes
Outlook
No
No
⚠ Yes
No
No
Checked via [email protected]
· 2026-03-27 13:31:39 UTC · ↺ Refresh
MX Hostnames
- aon-de.mail.protection.outlook.com
MX Priorities
- aon-de.mail.protection.outlook.com: 10
A / AAAA Records
- 104.18.39.201 (no PTR)
- 172.64.148.55 (no PTR)
Mail Server IPs
- 52.101.40.1 ↩ mail-cy4pr03cu00101.inbound.protection.outlook.com
- 52.101.41.24 ↩ mail-sj0pr03cu01600.inbound.protection.outlook.com
- 52.101.11.15 ↩ mail-sa9pr02cu00207.inbound.protection.outlook.com
- 52.101.10.6 ↩ mail-bn1pr21cu00106.inbound.protection.outlook.com
SOA Record
Raw SOA
gabe.ns.cloudflare.com dns.cloudflare.com 2399843470 10000 2400 604800 1800
Primary NS (mname)
gabe.ns.cloudflare.com
Admin Email (rname)
dns@cloudflare.com
Serial
2399843470
Refresh
10000s
Retry
2400s
Expire
604800s
Minimum TTL
1800s
Nameservers (NS)
jacqueline.ns.cloudflare.com
gabe.ns.cloudflare.com
SPF Record
✓ Strict (-all)
v=spf1 include:spf.aon.net include:spf.sendinblue.com -all
📊 DNS lookups: 2/10
✓ Hard fail (-all) — strict enforcement
DMARC Record
✓ Reject
v=DMARC1; p=reject; fo=1; rua=mailto:[email protected]; ruf=mailto:[email protected]
✓ Reject — strongest protection
📋 SPF alignment: Relaxed
· DKIM alignment: Relaxed
📧 Reports → mailto:[email protected]
DKIM Selectors
✓ 5 found
selector1._domainkey
selector2._domainkey
mail._domainkey
s1._domainkey
s2._domainkey
✓ Public key: 392 chars (valid)
✓ DKIM properly configured for selector: selector1
Checked: google, selector1/2, default, mail, dkim, k1, s1/2, zoho, sendgrid, mxvault, amazonses
All TXT Records
16 records- _8n0d4xzrfmp009w1eqq9hspx47ak9so
- _frjaxhu2n339t6iaygl4al851ruwwfp
- atlassian-domain-verification=4B2A1eOljaMNfiq1qW4Tx9HaqNAF1u4H5dr39luRvEgNiG7L2ppWq4CMmGuDpBRX
- atlassian-domain-verification=EkniTxo5gGtHAh1G+LOlh0f3zcI+uEj1S10SFSyUsIgN2jEovufkdS0wsETZPiQc
- cisco-ci-domain-verification=47aeca1676edd7210fadcb2c2a4332576bbbd4e11fd453ce08d63231f5c2a4d0
- docusign=024efd8f-cdc8-47d2-885c-6b885fca247b
- figma-domain-verification=d620b889974ad0d1fdd07942f67906d3087c0ba734f56aa07c7c919b027f6245-1752694145
- ibmid=7ffa7167-ef8b-4097-a8fd-585812375a73
- pbvxht2c1brl2pflgfy2f2ymxjxggc05
- v=msv1t=0C50E39E-B60D-4021-8BED-ED0CF4740F59
- SPFv=spf1 include:spf.aon.net include:spf.sendinblue.com -all
- ygd4sw7rvws0dfmqv307309tb0dxkd3m
- 2XMQAJnogOhK5c3WV9iHuOUt1tORHckMfuG3Kp8nGHFalW2LRWO7g/7c2P5VG1k19gduOWugHAT5VleNyjUkKA==
- 5f923f19-d439-4f87-8b12-bc624a7fce04
- 5xxyl6ny57y50ptkmbw8msxk02bv6hqx
- Sendinblue-code:7c542a5a42617b8f3f2175e1dd96ed5f
Full email verification for aon.de
Run SMTP check, SPF/DKIM/DMARC and catch-all detection.
SPF / DKIM / DMARC Get 1,000 Free Credits