onsim.uk

Valid Email Server
Domain Lookup › onsim.uk

Domain Overview

DNS: ✓ 2mo ago Checker: ✓ 2mo ago
onsim.uk
Yes
✓ Yes
Outlook
No
No
⚠ Yes
No
No
Did you mean: [email protected]

Checked via [email protected] · 2026-03-20 21:51:51 UTC · ↺ Refresh

MX Hostnames

  • onsim-uk.mail.protection.outlook.com

MX Priorities

  • onsim-uk.mail.protection.outlook.com: 0

A / AAAA Records

  • 18.164.96.89 ↩ server-18-164-96-89.jfk50.r.cloudfront.net
  • 18.164.96.123 ↩ server-18-164-96-123.jfk50.r.cloudfront.net
  • 18.164.96.78
  • 18.164.96.36

Mail Server IPs

  • 52.101.99.0 ↩ mail-cwxp265cu00600.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:ca0b:: ↩ mail-lo2p265cu02300.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::1 ↩ mail-lo3p265cu00301.inbound.protection.outlook.com

SOA Record

Raw SOA ns-1002.awsdns-61.net awsdns-hostmaster.amazon.com 1 7200 900 1209600 86400
Primary NS (mname)
ns-1002.awsdns-61.net
Admin Email (rname)
awsdns-hostmaster@amazon.com
Serial
1
Refresh
7200s
Retry
900s
Expire
1209600s
Minimum TTL
86400s

Nameservers (NS)

ns-1809.awsdns-34.co.uk
ns-228.awsdns-28.com
ns-1002.awsdns-61.net
ns-1132.awsdns-13.org

SPF Record

✓ Soft Fail (~all)
v=spf1 include:_spf.google.com include:mail.zendesk.com include:stspg-customer.com include:spf.protection.outlook.com include:messages.desk-phone.com ip4:129.159.251.61 ip4:138.2.167.42 ~all
📊 DNS lookups: 5/10
~ Soft fail (~all) — moderate enforcement

DMARC Record

~ Quarantine
v=DMARC1; p=quarantine; rua=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: 392 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

7 records
  • status-page-domain-verification=c8tflmwbbt0y
  • DKIMv=DKIM1; k=rsa; p=MIGfMA0GCSqGSIb3DQEBAQUAA4GNADCBiQKBgQC0mYW+NFx+Bo5TJ1I6JbKEhaaQ7K7I5SA0rZmE1oTvLmI3AOmYcG20Y5hkDK40Z0VKzSgH2FleyZj/1ttVnPvRhUVYWjiljtom93+N04H0WIlGR0Xe41OWx++iYCZ1J1w5u+jfGhj+UQKzjmaptTw23H27FgGZ58CFtEdX546WvQIDAQAB
  • SPFv=spf1 include:_spf.google.com include:mail.zendesk.com include:stspg-customer.com include:spf.protection.outlook.com include:messages.desk-phone.com ip4:129.159.251.61 ip4:138.2.167.42 ~all
  • MS=ms31083024
  • apple-domain-verification=SLVBGMUjK0AjrZi5
  • facebook-domain-verification=7u0e8xq54n8njrqzfmju8fj7a2nt9h
  • google-site-verification=otrkXKeCRzGVA4rtnsdfQoJCU5y5zlsPDqXdyHLRESw
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