Domain Overview
DNS: ✓ 2mo ago
Checker: ✓ 2mo ago
tbrothers.com
Yes
✓ Yes
Barracuda
No
No
⚠ Yes
No
No
Checked via [email protected]
· 2026-03-22 17:52:22 UTC · ↺ Refresh
MX Hostnames
- d254955a.ess.barracudanetworks.com
- d254955b.ess.barracudanetworks.com
MX Priorities
- d254955a.ess.barracudanetworks.com: 10
- d254955b.ess.barracudanetworks.com: 20
A / AAAA Records
- 185.158.133.1 (no PTR)
Mail Server IPs
- 209.222.82.252 ↩ mail.ess.barracuda.com
- 209.222.82.255 ↩ mail.ess.barracuda.com
- 209.222.82.253 ↩ mail.ess.barracuda.com
SOA Record
Raw SOA
ns.pseconds.com system.pseconds.com 2026030409 3600 1800 1209600 86400
Primary NS (mname)
ns.pseconds.com
Admin Email (rname)
system@pseconds.com
Serial
2026030409
Refresh
3600s
Retry
1800s
Expire
1209600s
Minimum TTL
86400s
Nameservers (NS)
ns.pseconds.com
ns2.pseconds.com
SPF Record
✓ Strict (-all)
v=spf1 include:spf.protection.outlook.com include:email-od.com include:spf-us.emailsignatures365.com ip4:38.92.146.1 ip4:173.11.39.129 ip4:65.155.10.138 ip4:65.157.72.218 ip4:98.212.122.135 ip4:24.220.115.15 ip4:159.89.240.52 -all
📊 DNS lookups: 3/10
✓ Hard fail (-all) — strict enforcement
DMARC Record
✓ Reject
v=DMARC1;p=reject;sp=none;adkim=r;aspf=r;pct=100;fo=1;rf=afrf;ri=86400;rua=mailto:[email protected];ruf=mailto:[email protected]
✓ Reject — strongest protection
📋 SPF alignment: Relaxed
· DKIM alignment: Relaxed
📧 Reports → mailto:[email protected]
↳ Subdomain policy: none
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
4 records- linkedin-site-verification=9f1ff681-7dbc-4a71-bec9-f34effff1f6f
- google-site-verification=xqbZhqiEtL4b9WTA2nLFGIaV7EP_8gryJ65iwhoAme8
- MS=ms70348943
- SPFv=spf1 include:spf.protection.outlook.com include:email-od.com include:spf-us.emailsignatures365.com ip4:38.92.146.1 ip4:173.11.39.129 ip4:65.155.10.138 ip4:65.157.72.218 ip4:98.212.122.135 ip4:24.220.115.15 ip4:159.89.240.52 -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 tbrothers.com
SMTP handshake, catch-all detection, custom validation rules, actual deliverability tests, and more.
No credit card required
Get 1,000 Free Credits