Domain Overview
DNS: ✓ 2mo ago
Checker: ✓ 2mo ago
mypostoffice.co.uk
Yes
✓ Yes
Unknown
No
No
⚠ Yes
No
No
Did you mean: [email protected]
Checked via [email protected]
· 2026-03-26 14:33:32 UTC · ↺ Refresh
MX Hostnames
- mta.mailsys.org
MX Priorities
- mta.mailsys.org: 10
A / AAAA Records
- 34.242.82.39 ↩ ec2-34-242-82-39.eu-west-1.compute.amazonaws.com
- 63.35.200.91 ↩ ec2-63-35-200-91.eu-west-1.compute.amazonaws.com
Mail Server IPs
- 3.9.108.212 ↩ mta.mailsys.org
- 35.178.137.142 ↩ mta.mailsys.org
- 3.11.140.214 ↩ mta.mailsys.org
SOA Record
Raw SOA
ds0.opaltelecom.net noc.opaltelecom.net 2024082717 28800 7200 604800 86400
Primary NS (mname)
ds0.opaltelecom.net
Admin Email (rname)
noc@opaltelecom.net
Serial
2024082717
Refresh
28800s
Retry
7200s
Expire
604800s
Minimum TTL
86400s
Nameservers (NS)
ds2.opaltelecom.net
ds1.opaltelecom.net
ds0.opaltelecom.net
SPF Record
✓ Strict (-all)
v=spf1 include:spf.mailsys.org -all
📊 DNS lookups: 1/10
✓ Hard fail (-all) — strict enforcement
DMARC Record
✗ MissingNo DMARC record — emails cannot be rejected on auth failure.
DKIM Selectors
✗ None detectedNo 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
4 records- 5kph3gv45702s696dlsv6556zm7b7gmk
- q33jhot29da6ur0mvt8t3q30ca
- SPFv=spf1 include:spf.mailsys.org -all
- google-site-verification=CRs6I1WhIkTIrhBMRdYrZH9dNqpyUf7Lu2pmJvVECks
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 mypostoffice.co.uk
SMTP handshake, catch-all detection, custom validation rules, actual deliverability tests, and more.
No credit card required
Get 1,000 Free Credits