Domain Overview
DNS: ✓ 2mo ago
Checker: ✓ 2mo ago
colchester.ac.uk
Yes
✓ Yes
Outlook
No
No
⚠ Yes
No
No
Did you mean: [email protected]
Checked via [email protected]
· 2026-04-06 15:35:54 UTC · ↺ Refresh
MX Hostnames
- colchester-ac-uk.mail.protection.outlook.com
MX Priorities
- colchester-ac-uk.mail.protection.outlook.com: 0
A / AAAA Records
- 77.68.80.112 ↩ live.server.test-colchester.co.uk
Mail Server IPs
- 52.101.89.0 ↩ mail-lo2p265cu02300.inbound.protection.outlook.com
- 52.101.89.2 ↩ mail-lo3p265cu00302.inbound.protection.outlook.com
- 52.101.99.2 ↩ mail-cwxp265cu00502.inbound.protection.outlook.com
- 52.101.89.1 ↩ mail-lo0p265cu00201.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
- 2a01:111:f403:ca0b::2 ↩ mail-lo0p265cu00202.inbound.protection.outlook.com
SOA Record
Raw SOA
ns11.ja.net hostmaster.ns11.ja.net 2021042962 43200 3600 3600000 3600
Primary NS (mname)
ns11.ja.net
Admin Email (rname)
hostmaster@ns11.ja.net
Serial
2021042962
Refresh
43200s
Retry
3600s
Expire
3600000s
Minimum TTL
3600s
Nameservers (NS)
ns12.ja.net
ns10.ja.net
ns11.ja.net
SPF Record
✓ Soft Fail (~all)
v=spf1 redirect=_slzuer1ng.sdmarc.net
📊 DNS lookups: 1/10
DMARC Record
✓ Reject
v=DMARC1; p=reject; pct=100; rua=mailto:[email protected]
✓ Reject — strongest protection
📋 SPF alignment: Relaxed
· DKIM alignment: Relaxed
📧 Reports → mailto:[email protected]
DKIM Selectors
✓ 4 found
selector1._domainkey
selector2._domainkey
s1._domainkey
s2._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- apple-domain-verification=EVLYuBySr7yzYelu
- MS=ms12030711
- MS=274515AD4606023BC68A87ADFC7B7B32D6D964BD
- MS=D9F76BB9CDABE64807FA8EC3663030AF9DD4F1DF
- MS=ms40534297
- MS=ms82233103
- v=verifydomain MS=ms32409186
- google-site-verification=uFZKwkWXp6pZifRGgtgE-9smcR2pOFrLd0iw7jlzXvs
- SPFv=spf1 redirect=_slzuer1ng.sdmarc.net
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 colchester.ac.uk
SMTP handshake, catch-all detection, custom validation rules, actual deliverability tests, and more.
No credit card required
Get 1,000 Free Credits