Domain Overview
DNS: ✓ 2mo ago
Checker: ✓ 2mo ago
big5.tech
Yes
✓ Yes
Outlook
No
No
⚠ Yes
No
No
Did you mean: [email protected]
Checked via [email protected]
· 2026-03-31 01:47:05 UTC · ↺ Refresh
MX Hostnames
- big5-tech.mail.protection.outlook.com
MX Priorities
- big5-tech.mail.protection.outlook.com: 0
A / AAAA Records
- 44.193.116.220 ↩ ec2-44-193-116-220.compute-1.amazonaws.com
Mail Server IPs
- 52.101.198.1 ↩ mail-cp4p284cu00401.inbound.protection.outlook.com
- 52.101.198.38 ↩ mail-cp3p284cu00706.inbound.protection.outlook.com
- 52.101.200.0 ↩ mail-roap284cu02600.inbound.protection.outlook.com
- 52.101.198.0 ↩ mail-cp5p284cu01800.inbound.protection.outlook.com
SOA Record
Raw SOA
ns-813.awsdns-37.net awsdns-hostmaster.amazon.com 1 7200 900 1209600 86400
Primary NS (mname)
ns-813.awsdns-37.net
Admin Email (rname)
awsdns-hostmaster@amazon.com
Serial
1
Refresh
7200s
Retry
900s
Expire
1209600s
Minimum TTL
86400s
Nameservers (NS)
ns-1387.awsdns-45.org
ns-1747.awsdns-26.co.uk
ns-813.awsdns-37.net
ns-102.awsdns-12.com
SPF Record
✓ Soft Fail (~all)
v=spf1 a:172-31-23-92.ec2.internal ip4:3.94.44.84 ip4:177.87.24.48/29 include:spf.protection.outlook.com include:amazonses.com include:spf.mandrillapp.com ~all
📊 DNS lookups: 4/10
~ Soft fail (~all) — moderate enforcement
DMARC Record
✗ p=none
v=DMARC1; p=none;
⚠ p=none — monitoring only, no enforcement
📋 SPF alignment: Relaxed
· DKIM alignment: Relaxed
⚠ No aggregate reports (rua= not set)
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
3 records- google-site-verification=smao79fbOjST16ro0oJAn0GsHVwAbXSyACfPWyj-ZSE
- SPFv=spf1 a:172-31-23-92.ec2.internal ip4:3.94.44.84 ip4:177.87.24.48/29 include:spf.protection.outlook.com include:amazonses.com include:spf.mandrillapp.com ~all
- MS=421D5C013EC558C521B3C4F5D3D8D52E288C7D1C
Full email verification for big5.tech
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