certax-accounting.co.uk

Valid Email Server
Domain Lookup › certax-accounting.co.uk

Domain Overview

DNS: ✓ 2mo ago Checker: ✓ 2mo ago
certax-accounting.co.uk
Yes
✓ Yes
Outlook
No
No
⚠ Yes
No
No
Did you mean: [email protected]

Checked via [email protected] · 2026-03-22 01:18:29 UTC · ↺ Refresh

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MX Hostnames

  • certaxaccounting-co-uk01e.mail.protection.outlook.com

MX Priorities

  • certaxaccounting-co-uk01e.mail.protection.outlook.com: 0

A / AAAA Records

  • 185.151.30.132 ↩ 185-151-30-132.ptr4.stackcp.net

Mail Server IPs

  • 52.101.99.0 ↩ mail-cwxp265cu00600.inbound.protection.outlook.com
  • 52.101.89.1 ↩ mail-lo0p265cu00201.inbound.protection.outlook.com
  • 52.101.89.2 ↩ mail-lo3p265cu00302.inbound.protection.outlook.com
  • 52.101.89.0 ↩ mail-lo2p265cu02300.inbound.protection.outlook.com
  • 2a01:111:f403:ca0b::1 ↩ mail-lo3p265cu00301.inbound.protection.outlook.com
  • 2a01:111:f403:ca0b::2 ↩ mail-lo0p265cu00202.inbound.protection.outlook.com
  • 2a01:111:f403:ca1a::1 ↩ mail-cwxp265cu00601.inbound.protection.outlook.com
  • 2a01:111:f403:ca0b:: ↩ mail-lo2p265cu02300.inbound.protection.outlook.com

SOA Record

Raw SOA ns4.supersys.net hostmaster.supersys.net 2025061908 3600 900 1209600 3600
Primary NS (mname)
ns4.supersys.net
Admin Email (rname)
hostmaster@supersys.net
Serial
2025061908
Refresh
3600s
Retry
900s
Expire
1209600s
Minimum TTL
3600s

Nameservers (NS)

ns4.supersys.net
ns5.supersys.net

SPF Record

✓ Strict (-all)
v=spf1 a:mail.supersys.net include:spf.protection.outlook.com a mx -all
📊 DNS lookups: 4/10
✓ Hard fail (-all) — strict enforcement

DMARC Record

✗ Missing

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

DKIM Selectors

✓ 2 found
selector1._domainkey
selector2._domainkey
✓ Public key: 216 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

1 record
  • SPFv=spf1 a:mail.supersys.net include:spf.protection.outlook.com a mx -all
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