crystalbooks.ca

Valid Email Server
Domain Lookup › crystalbooks.ca

Domain Overview

DNS: ✓ 2mo ago Checker: ✓ 2mo ago
crystalbooks.ca
Yes
✓ Yes
Unknown
No
No
⚠ Yes
No
No

Checked via [email protected] · 2026-03-24 16:19:32 UTC · ↺ Refresh

MX Hostnames

  • mx19-2.mycloudmailbox.com
  • mx19-1.mycloudmailbox.com

MX Priorities

  • mx19-1.mycloudmailbox.com: 0
  • mx19-2.mycloudmailbox.com: 0

A / AAAA Records

  • 104.21.36.40 (no PTR)
  • 172.67.184.184 (no PTR)
  • 2606:4700:3032::6815:2428 (no PTR)
  • 2606:4700:3033::ac43:b8b8 (no PTR)

Mail Server IPs

  • 173.46.152.139 ↩ mx19-2.mycloudmailbox.com
  • 173.46.152.138 ↩ mx19-1.mycloudmailbox.com

SOA Record

Raw SOA rob.ns.cloudflare.com dns.cloudflare.com 2399181278 10000 2400 604800 1800
Primary NS (mname)
rob.ns.cloudflare.com
Admin Email (rname)
dns@cloudflare.com
Serial
2399181278
Refresh
10000s
Retry
2400s
Expire
604800s
Minimum TTL
1800s

Nameservers (NS)

rob.ns.cloudflare.com
sandra.ns.cloudflare.com

SPF Record

✓ Strict (-all)
v=spf1 ip4:216.194.165.98 ip4:173.46.152.128/25 ip4:199.244.76.0/24 -all
📊 DNS lookups: 0/10
✓ Hard fail (-all) — strict enforcement

DMARC Record

✗ Missing

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

DKIM Selectors

✓ 1 found
default._domainkey
✓ Public key: 392 chars (valid)
✓ DKIM properly configured for selector: default

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

All TXT Records

6 records
  • google-site-verification=UIy9VXqH9-gAo6mutBNov-FIVXWGDo5YcSNDCwkNtnI
  • google-site-verification=bYRvYWUH9OMl58zMiolhueQBycI4TpYbHepoBs8PLbk
  • SPFv=spf1 ip4:216.194.165.98 ip4:173.46.152.128/25 ip4:199.244.76.0/24 -all
  • • TXT Value: v=spf1 include:spf.protection.outlook.com -all
  • cloud-manager-verification=r5dT0XrP/EiiROuH8BSsg6R2vDVRJLxEqOqF0OTbMmI
  • google-site-verification=PTYxTKlkN7AWgDxIYjwCmllhyDoU81iyp4rQ-wktiOs
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