Domain Overview
DNS: ✓ 2mo ago
Checker: ✓ 2mo ago
rainbow.us
Yes
✓ Yes
Symantec
No
No
⚠ Yes
No
No
Checked via [email protected]
· 2026-03-18 10:53:15 UTC · ↺ Refresh
MX Hostnames
- cluster9a.us.messagelabs.com
- cluster9.us.messagelabs.com
MX Priorities
- cluster9.us.messagelabs.com: 20
- cluster9a.us.messagelabs.com: 30
A / AAAA Records
- 54.68.182.72 ↩ ec2-54-68-182-72.us-west-2.compute.amazonaws.com
- 34.213.106.51 ↩ ec2-34-213-106-51.us-west-2.compute.amazonaws.com
Mail Server IPs
- 67.219.247.111 ↩ mail924.messagelabs.com
- 67.219.247.207 ↩ mail932.messagelabs.com
- 67.219.250.219 ↩ mail952.messagelabs.com
- 67.219.246.219 ↩ mail905.messagelabs.com
- 67.219.246.213 ↩ mail912.messagelabs.com
- 67.219.250.220 ↩ mail946.messagelabs.com
- 34.75.172.113 ↩ 113.172.75.34.bc.googleusercontent.com
SOA Record
Raw SOA
ns1.peer1.net hostmaster.rainbow.us 95 500 500 8640 1800
Primary NS (mname)
ns1.peer1.net
Admin Email (rname)
hostmaster@rainbow.us
Serial
95
Refresh
500s
Retry
500s
Expire
8640s
Minimum TTL
1800s
Nameservers (NS)
ns1.peer1.net
ns2.peer1.net
SPF Record
✓ Strict (-all)
v=spf1 ip4:162.252.35.0/24 ip4:66.153.96.112/28 include:spf.messagelabs.com include:spf.protection.outlook.com -all
📊 DNS lookups: 2/10
✓ Hard fail (-all) — strict enforcement
DMARC Record
✗ MissingNo DMARC record — emails cannot be rejected on auth failure.
DKIM Selectors
✗ None detectedNo 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- SPFv=spf1 ip4:162.252.35.0/24 ip4:66.153.96.112/28 include:spf.messagelabs.com include:spf.protection.outlook.com -all
- duo_sso_verification=koWujaubcjcnTdm49MPf1NwNF81ADWwyrNlPBYsvnOKEwQei1ZGvyv9KvqmFA17q
Full email verification for rainbow.us
Run SMTP check, SPF/DKIM/DMARC and catch-all detection.
SPF / DKIM / DMARC Get 1,000 Free Credits