Live data — DNS records and disposable check were just fetched and saved.
Domain Overview
DNS: ⚡ live
Checker: ⚡ live
37signals.com
Yes
✓ Yes
Unknown
No
No
⚠ Yes
No
No
Checked via [email protected]
· 2026-05-21 01:55:59 UTC · ↺ Refresh
MX Hostnames
- work-mx.app.hey.com
MX Priorities
No priority data.
A / AAAA Records
- 104.18.0.135
- 104.18.1.135
Mail Server IPs
No IPs resolved.
SOA Record
No SOA record found.
Nameservers (NS)
serena.ns.cloudflare.com
merlin.ns.cloudflare.com
SPF Record
✓ Strict (-all)
v=spf1 include:_spf.basecamp.com include:servers.mcsv.net -all
📊 DNS lookups: 2/10
✓ Hard fail (-all) — strict enforcement
DMARC Record
~ Quarantine
v=DMARC1; p=quarantine; adkim=r; aspf=r; ri=3600; sp=none; fo=1;
~ Quarantine — good protection (failing mail goes to spam)
📋 SPF alignment: Relaxed
· DKIM alignment: Relaxed
⚠ No aggregate reports (rua= not set)
↳ Subdomain policy: none
DKIM Selectors
✓ 1 found
k1._domainkey
✓ Public key: 216 chars (valid)
✓ DKIM properly configured for selector: k1
Checked: google, selector1/2, default, mail, dkim, k1, s1/2, zoho, sendgrid, mxvault, amazonses
All TXT Records
11 records- atlassian-domain-verification=jDcnbDUp4Eqr8vcG6rwzJC/AiL4ryyQCoTDiAKjKnP7rzlvnA4akV4QxvGnUaMS8
- google-site-verification=75SnvFixCmuTIw1yttct06G6Mk7vGOqJDKqVd4sD66g
- google-site-verification=vPyWJnzga2ciedbmL9z3PaMMS7gMZba_d4KE-GXzcUI
- hey-verification:wvrWxEPH2vgJ5hJp8cjdWfZx
- openai-domain-verification=dv-brKIWqu5JEkAoXYjfCz66ucV
- stripe-verification=F970494BA4495175BB0BBBBBB611C2410B599753DB459B0B27676C72D5A688A6
- SPFv=spf1 include:_spf.basecamp.com include:servers.mcsv.net -all
- 8x2rys9qrtmrt08s01k2dhf220y0bc3h
- ZOOM_verify_3PsRA01tPEqbRQuZq0ovDX
- anthropic-domain-verification-2ned89=7e1u02UWpXxRVFbqXvTepQODa
- apple-domain-verification=fZq9u43pq901FVrX
Full email verification for 37signals.com
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