Domain Overview
DNS: ✓ 2mo ago
Checker: ✓ 2mo ago
backcs.co.uk
Yes
✓ Yes
Outlook
No
No
⚠ Yes
No
No
Did you mean: [email protected]
Checked via [email protected]
· 2026-03-25 06:22:44 UTC · ↺ Refresh
MX Hostnames
- backcs-co-uk.mail.protection.outlook.com
MX Priorities
- backcs-co-uk.mail.protection.outlook.com: 10
A / AAAA Records
- 78.129.212.118 (no PTR)
Mail Server IPs
- 52.101.89.0 ↩ mail-lo2p265cu02300.inbound.protection.outlook.com
- 52.101.89.2 ↩ mail-lo3p265cu00302.inbound.protection.outlook.com
- 52.101.99.0 ↩ mail-cwxp265cu00600.inbound.protection.outlook.com
- 52.101.99.2 ↩ mail-cwxp265cu00502.inbound.protection.outlook.com
- 2a01:111:f403:ca0b:: ↩ mail-lo2p265cu02300.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:ca1a:: ↩ mail-cwxp265cu00500.inbound.protection.outlook.com
SOA Record
Raw SOA
ns0.ukfast.net support.ukfast.co.uk 2025111301 7200 3600 604800 600
Primary NS (mname)
ns0.ukfast.net
Admin Email (rname)
support@ukfast.co.uk
Serial
2025111301
Refresh
7200s
Retry
3600s
Expire
604800s
Minimum TTL
600s
Nameservers (NS)
ns0.ukfast.net
ns1.ukfast.net
SPF Record
✓ Strict (-all)
v=spf1 include:spf.protection.outlook.com include:mailgun.org ip4:87.106.141.116 ip4:78.129.212.118 -all
📊 DNS lookups: 2/10
✓ Hard fail (-all) — strict enforcement
DMARC Record
✓ Reject
v=DMARC1; p=reject; rua=mailto:[email protected]; ruf=mailto:[email protected]; sp=reject; fo=1
✓ Reject — strongest protection
📋 SPF alignment: Relaxed
· DKIM alignment: Relaxed
📧 Reports → mailto:[email protected]
↳ Subdomain policy: reject
DKIM Selectors
✓ 3 found
selector1._domainkey
selector2._domainkey
s1._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 include:spf.protection.outlook.com include:mailgun.org ip4:87.106.141.116 ip4:78.129.212.118 -all
Full email verification for backcs.co.uk
Run SMTP check, SPF/DKIM/DMARC and catch-all detection.
SPF / DKIM / DMARC Get 1,000 Free Credits