Domain Overview
DNS: ✓ 1d ago
Checker: ✓ 1d ago
tetraltd.ca
Yes
✓ Yes
Outlook
No
No
⚠ Yes
No
No
Checked via [email protected]
· 2026-05-20 06:19:12 UTC · ↺ Refresh
MX Hostnames
- tetraltd-ca.mail.protection.outlook.com
MX Priorities
- tetraltd-ca.mail.protection.outlook.com: 0
A / AAAA Records
- 172.67.182.229 (no PTR)
- 104.21.75.227 (no PTR)
- 2606:4700:3036::6815:4be3
- 2606:4700:3034::ac43:b6e5
Mail Server IPs
- 52.101.190.0 ↩ mail-yt5pr01cu00100.inbound.protection.outlook.com
- 52.101.190.1 ↩ mail-yt3pr01cu00701.inbound.protection.outlook.com
- 52.101.192.1 ↩ mail-yqzpr01cu01001.inbound.protection.outlook.com
- 52.101.190.3 ↩ mail-yt6pr01cu00103.inbound.protection.outlook.com
- 2a01:111:f403:c944::1 ↩ mail-yqzpr01cu01001.inbound.protection.outlook.com
- 2a01:111:f403:c942::2 ↩ mail-yt3pr01cu00602.inbound.protection.outlook.com
- 2a01:111:f403:c942:: ↩ mail-yt5pr01cu00100.inbound.protection.outlook.com
- 2a01:111:f403:c942::1 ↩ mail-yt3pr01cu00701.inbound.protection.outlook.com
SOA Record
Raw SOA
corey.ns.cloudflare.com dns.cloudflare.com 2402559418 10000 2400 604800 1800
Primary NS (mname)
corey.ns.cloudflare.com
Admin Email (rname)
dns@cloudflare.com
Serial
2402559418
Refresh
10000s
Retry
2400s
Expire
604800s
Minimum TTL
1800s
Nameservers (NS)
corey.ns.cloudflare.com
diva.ns.cloudflare.com
SPF Record
✓ Strict (-all)
v=spf1 a include:spf.protection.outlook.com ip4:204.191.123.197 -all
📊 DNS lookups: 2/10
✓ Hard fail (-all) — strict enforcement
DMARC Record
✓ Reject
v=DMARC1;p=reject;pct=100;rua=mailto:[email protected];ruf=mailto:[email protected];ri=86400;fo=1;
✓ Reject — strongest protection
📋 SPF alignment: Relaxed
· DKIM alignment: Relaxed
📧 Reports → mailto:[email protected]
DKIM Selectors
✓ 2 found
selector1._domainkey
selector2._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
5 records- bw=Xkb3xSFe9dr1Bu2Gd2q7MkY1nSQAwy648dH1EFkgXIoJ
- k77s1llkkp181lgppkuppvrcef
- m2398egc13k5mj30su5ap8rb4b
- SPFv=spf1 a include:spf.protection.outlook.com ip4:204.191.123.197 -all
- MS=ms36625853
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