Domain Overview
DNS: ✓ 2mo ago
Checker: ✓ 2mo ago
frontier.co.uk
Yes
✓ Yes
Outlook
No
No
⚠ Yes
No
No
Did you mean: [email protected]
Checked via [email protected]
· 2026-03-25 19:01:16 UTC · ↺ Refresh
MX Hostnames
- frontier-co-uk.mail.protection.outlook.com
MX Priorities
- frontier-co-uk.mail.protection.outlook.com: 10
A / AAAA Records
- 52.211.240.116 ↩ ec2-52-211-240-116.eu-west-1.compute.amazonaws.com
- 52.30.198.162 ↩ ec2-52-30-198-162.eu-west-1.compute.amazonaws.com
- 52.49.51.16
- 2a05:d018:d09:dd11:8fdc:1c6f:cc9d:d53c
- 2a05:d018:d09:dd12:8fdc:1c6f:cc9d:d53a
- 2a05:d018:d09:dd10:8fdc:1c6f:cc9d:d53b
Mail Server IPs
- 52.101.99.0 ↩ mail-cwxp265cu00600.inbound.protection.outlook.com
- 52.101.99.2 ↩ mail-cwxp265cu00502.inbound.protection.outlook.com
- 52.101.89.0 ↩ mail-lo2p265cu02300.inbound.protection.outlook.com
- 52.101.89.1 ↩ mail-lo0p265cu00201.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
- 2a01:111:f403:ca0b::1 ↩ mail-lo3p265cu00301.inbound.protection.outlook.com
SOA Record
Raw SOA
ns25.domaincontrol.com dns.jomax.net 2026030703 28800 7200 604800 600
Primary NS (mname)
ns25.domaincontrol.com
Admin Email (rname)
dns@jomax.net
Serial
2026030703
Refresh
28800s
Retry
7200s
Expire
604800s
Minimum TTL
600s
Nameservers (NS)
ns25.domaincontrol.com
ns26.domaincontrol.com
SPF Record
✓ Strict (-all)
v=spf1 include:amazonses.com include:mail.zendesk.com include:_spf.salesforce.com include:_spf.psm.knowbe4.com a:b.spf.service-now.com a:c.spf.service-now.com a:d.spf.service-now.com include:spf.protection.outlook.com -all
📊 DNS lookups: 8/10
✓ Hard fail (-all) — strict enforcement
DMARC Record
~ Quarantine
v=DMARC1;p=quarantine;rua=mailto:[email protected];ruf=mailto:[email protected]
~ Quarantine — good protection (failing mail goes to spam)
📋 SPF alignment: Relaxed
· DKIM alignment: Relaxed
📧 Reports → mailto:[email protected]
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
9 records- google-site-verification=zGTsBssakVb6CnJi1bs_kcoj51qpBMvrXG3k02aQh0s
- MS=DCFB13BD4C203F3679427A5686B61769D939991D
- google-site-verification=UYedWhhATUwHL36HdWOw4fqQc7x3Z658MSAxxk1wZVQ
- 0ed1fe018a084e7564843f45d98426b4c2be9e6258
- MS=ms17363627
- SPFv=spf1 include:amazonses.com include:mail.zendesk.com include:_spf.salesforce.com include:_spf.psm.knowbe4.com a:b.spf.service-now.com a:c.spf.service-now.com a:d.spf.service-now.com include:spf.protection.outlook.com -all
- google-site-verification=MYQixIFMz-zY8cplQGMB1ye_Qz3kcc0ef7_5XMCriXU
- ec7aed02460e256c2a37dd63e0a4f0a873295d3398e8fceea1
- qW589cOrznCXErTh/mhlJRuEeKMNxjcVwhXyh76L/r35jwDCYr1s7Zro9C8biLyBE7vfylmS5xtuiohiHUpzHQ==
Free · No signup required
Add email validation to your forms
Block disposable emails, validate MX records, detect role accounts — unlimited, forever free.
<script src="https://check.verifyswift.com/"></script>
One line of code · Works on any site
See demo & docs
Deep verification
Full email verification for frontier.co.uk
SMTP handshake, catch-all detection, custom validation rules, actual deliverability tests, and more.
No credit card required
Get 1,000 Free Credits