ctobridge.io

Valid Email Server
Domain Lookup › ctobridge.io

Domain Overview

DNS: ✓ 10h ago Checker: ✓ 10h ago
ctobridge.io
Yes
✓ Yes
Outlook
No
No
⚠ Yes
No
No

Checked via [email protected] · 2026-05-21 06:53:25 UTC · ↺ Refresh

MX Hostnames

  • ctobridge-io.mail.protection.outlook.com

MX Priorities

  • ctobridge-io.mail.protection.outlook.com: 1

A / AAAA Records

  • 198.49.23.144 (no PTR)
  • 198.49.23.145 (no PTR)
  • 198.185.159.144
  • 198.185.159.145

Mail Server IPs

  • 52.101.9.24 ↩ mail-bl2pr02cu00400.inbound.protection.outlook.com
  • 52.101.10.2 ↩ mail-bn8pr03cu00202.inbound.protection.outlook.com
  • 52.101.40.6 ↩ mail-cy1pr03cu00106.inbound.protection.outlook.com
  • 52.101.9.26 ↩ mail-bl0pr02cu00702.inbound.protection.outlook.com
  • 2a01:111:f403:c902::16 ↩ mail-byapr04cu00306.inbound.protection.outlook.com
  • 2a01:111:f403:c803:: ↩ mail-bn1pr21cu00200.inbound.protection.outlook.com
  • 2a01:111:f403:c946::1 ↩ mail-ch1pr04cu00101.inbound.protection.outlook.com
  • 2a01:111:f403:c92c::3 ↩ mail-dm5pr04cu00103.inbound.protection.outlook.com

SOA Record

Raw SOA dns1.p01.nsone.net hostmaster.nsone.net 1681772240 43200 7200 1209600 3600
Primary NS (mname)
dns1.p01.nsone.net
Admin Email (rname)
hostmaster@nsone.net
Serial
1681772240
Refresh
43200s
Retry
7200s
Expire
1209600s
Minimum TTL
3600s

Nameservers (NS)

dns4.p01.nsone.net
dns1.p01.nsone.net
dns3.p01.nsone.net
ns02.squarespacedns.com
dns2.p01.nsone.net
ns03.squarespacedns.com
ns04.squarespacedns.com
ns01.squarespacedns.com

SPF Record

✓ Strict (-all)
v=spf1 include:_spf.mailersend.net include:secureserver.net -all
📊 DNS lookups: 2/10
✓ Hard fail (-all) — strict enforcement

DMARC Record

✗ Missing

No DMARC record — emails cannot be rejected on auth failure.

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

2 records
  • google-site-verification=UyYL55fgG3aNldN-c4LTlYZrqwRpL1zdjKZ6NwxPsJs
  • SPFv=spf1 include:_spf.mailersend.net include:secureserver.net -all
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