union.co.uk

Valid Email Server
Domain Lookup › union.co.uk

Domain Overview

DNS: ✓ 2mo ago Checker: ✓ 2mo ago
union.co.uk
Yes
✓ Yes
Unknown
No
No
⚠ Yes
No
No
Did you mean: [email protected]

Checked via [email protected] · 2026-04-01 23:09:41 UTC · ↺ Refresh

MX Hostnames

  • mx-01-eu-west-1.prod.hydra.sophos.com
  • mx-02-eu-west-1.prod.hydra.sophos.com

MX Priorities

  • mx-02-eu-west-1.prod.hydra.sophos.com: 20
  • mx-01-eu-west-1.prod.hydra.sophos.com: 10

A / AAAA Records

  • 52.56.91.138 ↩ shared.uniondigital.co.uk

Mail Server IPs

  • 52.19.16.135 ↩ ec2-52-19-16-135.eu-west-1.compute.amazonaws.com
  • 54.76.166.245 ↩ ec2-54-76-166-245.eu-west-1.compute.amazonaws.com
  • 54.77.42.146 ↩ ec2-54-77-42-146.eu-west-1.compute.amazonaws.com

SOA Record

Raw SOA dns1.stabletransit.com ipadmin.stabletransit.com 1773312358 3600 300 1814400 300
Primary NS (mname)
dns1.stabletransit.com
Admin Email (rname)
ipadmin@stabletransit.com
Serial
1773312358
Refresh
3600s
Retry
300s
Expire
1814400s
Minimum TTL
300s

Nameservers (NS)

dns1.stabletransit.com
dns2.stabletransit.com

SPF Record

✓ Strict (-all)
v=spf1 include:_spf.prod.hydra.sophos.com include:spf.protection.outlook.com include:mailgun.org -all
📊 DNS lookups: 3/10
✓ Hard fail (-all) — strict enforcement

DMARC Record

~ Quarantine
v=DMARC1; p=quarantine; pct=100;
~ Quarantine — good protection (failing mail goes to spam)
📋 SPF alignment: Relaxed · DKIM alignment: Relaxed
⚠ No aggregate reports (rua= not set)

DKIM Selectors

✗ None detected

No DKIM records found for common selectors — your provider may use a custom selector name.

Checked: google, selector1/2, default, mail, dkim, k1, s1/2, zoho, sendgrid, mxvault, amazonses

All TXT Records

8 records
  • sophos-domain-verification=d6634f92a6dc58c158af41d0b30a9596515bfd36
  • MS=4A0C64E07752EBF5F571E508B903D83ED3D502C9
  • MS=ms80253143
  • apple-domain-verification=rFq05rGOrr0Fgw5Y
  • airtable-verification=1ad5329c5a5246d3acb47e53f5ff3127
  • jamf-site-verification=dc8i8IRjn79siPTRKNrGsQ
  • SPFv=spf1 include:_spf.prod.hydra.sophos.com include:spf.protection.outlook.com include:mailgun.org -all
  • extensis-domain-verification=2b5b74f4-502b-4412-804b-48fc8ef40bcc
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 union.co.uk

SMTP handshake, catch-all detection, custom validation rules, actual deliverability tests, and more.

No credit card required
Get 1,000 Free Credits