Domain Overview
DNS: ✓ 2mo ago
Checker: ✓ 2mo ago
retinamaculainstitute.com
Yes
✓ Yes
Barracuda
No
No
⚠ Yes
No
No
Checked via [email protected]
· 2026-03-28 07:22:07 UTC · ↺ Refresh
MX Hostnames
- d215199b.ess.barracudanetworks.com
- d215199a.ess.barracudanetworks.com
MX Priorities
- d215199a.ess.barracudanetworks.com: 10
- d215199b.ess.barracudanetworks.com: 20
A / AAAA Records
- 198.185.159.145 (no PTR)
- 198.185.159.144 (no PTR)
Mail Server IPs
- 209.222.82.253 ↩ mail.ess.barracuda.com
- 209.222.82.252 ↩ mail.ess.barracuda.com
- 209.222.82.255 ↩ mail.ess.barracuda.com
SOA Record
Raw SOA
lana.ns.cloudflare.com dns.cloudflare.com 2397069482 10000 2400 604800 1800
Primary NS (mname)
lana.ns.cloudflare.com
Admin Email (rname)
dns@cloudflare.com
Serial
2397069482
Refresh
10000s
Retry
2400s
Expire
604800s
Minimum TTL
1800s
Nameservers (NS)
lana.ns.cloudflare.com
sam.ns.cloudflare.com
SPF Record
✓ Strict (-all)
v=spf1 include:spf.protection.outlook.com -all
📊 DNS lookups: 1/10
✓ Hard fail (-all) — strict enforcement
DMARC Record
✗ MissingNo DMARC record — emails cannot be rejected on auth failure.
DKIM Selectors
✓ 3 found
selector1._domainkey
selector2._domainkey
default._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
2 records- tmes=549da784be77891366be5e2c3bde7542
- SPFv=spf1 include:spf.protection.outlook.com -all
Free · No signup required
Add email validation to your forms
Block disposable emails, validate MX records, detect role accounts — unlimited, forever free.
<script src="https://check.verifyswift.com/"></script>
One line of code · Works on any site
See demo & docs
Deep verification
Full email verification for retinamaculainstitute.com
SMTP handshake, catch-all detection, custom validation rules, actual deliverability tests, and more.
No credit card required
Get 1,000 Free Credits