Domain Overview
DNS: ✓ 2mo ago
Checker: ✓ 2mo ago
nucleus.co.uk
Yes
✓ Yes
Outlook
No
No
⚠ Yes
No
No
Did you mean: [email protected]
Checked via [email protected]
· 2026-03-20 15:58:55 UTC · ↺ Refresh
MX Hostnames
- nucleus-co-uk.mail.protection.outlook.com
MX Priorities
- nucleus-co-uk.mail.protection.outlook.com: 0
A / AAAA Records
- 104.21.12.215 (no PTR)
- 172.67.167.185 (no PTR)
- 2606:4700:3031::6815:cd7
- 2606:4700:3030::ac43:a7b9
Mail Server IPs
- 52.101.89.2 ↩ mail-lo3p265cu00302.inbound.protection.outlook.com
- 52.101.89.0 ↩ mail-lo2p265cu02300.inbound.protection.outlook.com
- 52.101.89.1 ↩ mail-lo0p265cu00201.inbound.protection.outlook.com
- 52.101.99.2 ↩ mail-cwxp265cu00502.inbound.protection.outlook.com
- 2a01:111:f403:ca1a::1 ↩ mail-cwxp265cu00601.inbound.protection.outlook.com
- 2a01:111:f403:ca0b::2 ↩ mail-lo0p265cu00202.inbound.protection.outlook.com
- 2a01:111:f403:ca0b:: ↩ mail-lo2p265cu02300.inbound.protection.outlook.com
- 2a01:111:f403:ca0b::1 ↩ mail-lo3p265cu00301.inbound.protection.outlook.com
SOA Record
Raw SOA
adam.ns.cloudflare.com dns.cloudflare.com 2398717037 10000 2400 604800 1800
Primary NS (mname)
adam.ns.cloudflare.com
Admin Email (rname)
dns@cloudflare.com
Serial
2398717037
Refresh
10000s
Retry
2400s
Expire
604800s
Minimum TTL
1800s
Nameservers (NS)
adam.ns.cloudflare.com
val.ns.cloudflare.com
SPF Record
✓ Soft Fail (~all)
v=spf1 include:_spf.mailersend.net include:spf.mailanyone.net include:spf.protection.outlook.com ~all
📊 DNS lookups: 3/10
~ Soft fail (~all) — moderate enforcement
DMARC Record
✗ p=none
v=DMARC1; p=none; rua=mailto:[email protected];
⚠ p=none — monitoring only, no enforcement
📋 SPF alignment: Relaxed
· DKIM alignment: Relaxed
📧 Reports → mailto:[email protected]
DKIM Selectors
✓ 2 found
selector1._domainkey
selector2._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
6 records- google-site-verification=j4SzSfFarfPWlwlDJ8m3HcpINefSdk3-jW4OtIK91gI
- SPFv=spf1 include:_spf.mailersend.net include:spf.mailanyone.net include:spf.protection.outlook.com ~all
- MS=ms35200042
- MS=ms39487221
- ZA=fbcBGpMByYjUEPhfl9uIiA==
- cblccw8k21ppbm76lxs7b9n053wyjsj6
Full email verification for nucleus.co.uk
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