Domain Overview
DNS: ✓ 2mo ago
Checker: ✓ 2mo ago
treinta.co
Yes
✓ Yes
Google
No
No
⚠ Yes
No
No
Checked via [email protected]
· 2026-03-22 06:02:53 UTC · ↺ Refresh
MX Hostnames
- alt1.aspmx.l.google.com
- alt3.aspmx.l.google.com
- aspmx.l.google.com
- alt2.aspmx.l.google.com
- alt4.aspmx.l.google.com
MX Priorities
- aspmx.l.google.com: 1
- alt3.aspmx.l.google.com: 10
- alt4.aspmx.l.google.com: 10
- alt1.aspmx.l.google.com: 5
- alt2.aspmx.l.google.com: 5
A / AAAA Records
- 198.202.211.1
Mail Server IPs
- 172.253.62.26 ↩ bc-in-f26.1e100.net
- 2607:f8b0:4004:c08::1a ↩ bi-in-f26.1e100.net
- 192.178.223.26 ↩ yulhrs-in-f26.1e100.net
- 2a00:1450:4009:c0f::1a ↩ yulhrs-in-f26.1e100.net
- 173.194.76.26 ↩ ws-in-f26.1e100.net
- 2a00:1450:400c:c00::1a ↩ ws-in-x1a.1e100.net
- 108.177.123.26 ↩ lcscld-in-f26.1e100.net
- 2800:3f0:4003:c0f::1b (no PTR)
- 172.253.116.27 ↩ dj-in-f27.1e100.net
- 2a00:1450:400b:c02::1a ↩ dj-in-f26.1e100.net
SOA Record
Raw SOA
ns-994.awsdns-60.net awsdns-hostmaster.amazon.com 2024030701 7200 900 1209600 86400
Primary NS (mname)
ns-994.awsdns-60.net
Admin Email (rname)
awsdns-hostmaster@amazon.com
Serial
2024030701
Refresh
7200s
Retry
900s
Expire
1209600s
Minimum TTL
86400s
Nameservers (NS)
ns-510.awsdns-63.com
ns-994.awsdns-60.net
ns-1383.awsdns-44.org
ns-1826.awsdns-36.co.uk
SPF Record
✓ Soft Fail (~all)
v=spf1 include:_spf.google.com include:mail.zendesk.com ~all
📊 DNS lookups: 2/10
~ Soft fail (~all) — moderate enforcement
DMARC Record
~ Quarantine
v=DMARC1; p=quarantine; pct=100; adkim=s; aspf=s; rua=mailto:[email protected],mailto:[email protected]
~ Quarantine — good protection (failing mail goes to spam)
📋 SPF alignment: Strict
· DKIM alignment: Strict
📧 Reports → mailto:[email protected],mailto:[email protected]
DKIM Selectors
✓ 1 found
google._domainkey
✓ Public key: 216 chars (valid)
✓ DKIM properly configured for selector: google
Checked: google, selector1/2, default, mail, dkim, k1, s1/2, zoho, sendgrid, mxvault, amazonses
All TXT Records
8 records- google-site-verification=P9OksSNbNs2OjQ4OQJVJP6oXBpktmNVpcJXC36m-rho
- google-site-verification=kpUKmf3-c5rLTX1djYnarJFmpR1hgj7czNxMYlY7g8E
- google-site-verification=vodeP1ZjTR66PYrnf8mSihADJCHcwphAiz6mqNlidas
- SPFv=spf1 include:_spf.google.com include:mail.zendesk.com ~all
- apple-domain-verification=7HeMR8iiN2BaqFbb
- atlassian-domain-verification=D2LnUN5huRoxqLmQxHptQINEnZLWamXzkxRVs5dVOQRaPQT3URJJ5bgxIFhCZpOf
- brevo-code:d123cdd5d033816519b753f4ebdbe736
- facebook-domain-verification=8nnskszzeh37alvpi049qdahyxym5c
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 treinta.co
SMTP handshake, catch-all detection, custom validation rules, actual deliverability tests, and more.
No credit card required
Get 1,000 Free Credits