Domain Overview
DNS: ✓ 2mo ago
Checker: ✓ 2mo ago
letterfour.com
Yes
✓ Yes
Google
No
No
⚠ Yes
No
No
Checked via [email protected]
· 2026-03-24 21:19:09 UTC · ↺ Refresh
MX Hostnames
- aspmx.l.google.com
- alt3.aspmx.l.google.com
- alt1.aspmx.l.google.com
- alt4.aspmx.l.google.com
- letterfour.com
- alt2.aspmx.l.google.com
MX Priorities
- alt2.aspmx.l.google.com: 5
- letterfour.com: 10
- alt1.aspmx.l.google.com: 5
- alt3.aspmx.l.google.com: 10
- alt4.aspmx.l.google.com: 10
- aspmx.l.google.com: 1
A / AAAA Records
- 198.202.211.1 (no PTR)
Mail Server IPs
- 172.253.116.27 ↩ dj-in-f27.1e100.net
- 2a00:1450:400b:c02::1a ↩ dj-in-f26.1e100.net
- 198.202.211.1 (no PTR)
- 108.177.123.27 ↩ lcscld-in-f27.1e100.net
- 2800:3f0:4003:c0f::1b (no PTR)
- 192.178.223.27 ↩ yulhrs-in-f27.1e100.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-f26.1e100.net
SOA Record
Raw SOA
ns1.worldwidedns.net hostmaster.letterfour.com 2026020234 14400 7200 1209600 3600
Primary NS (mname)
ns1.worldwidedns.net
Admin Email (rname)
hostmaster@letterfour.com
Serial
2026020234
Refresh
14400s
Retry
7200s
Expire
1209600s
Minimum TTL
3600s
Nameservers (NS)
ns102.digicertdns.com
ns101.digicertdns.com
ns2.worldwidedns.net
ns3.worldwidedns.net
ns100.digicertdns.com
ns1.worldwidedns.net
SPF Record
✓ Soft Fail (~all)
v=spf1 include:_spf.google.com include:23400455.spf06.hubspotemail.net ~all
📊 DNS lookups: 2/10
~ Soft fail (~all) — moderate enforcement
DMARC Record
✗ p=none
v=DMARC1; p=none;
⚠ p=none — monitoring only, no enforcement
📋 SPF alignment: Relaxed
· DKIM alignment: Relaxed
⚠ No aggregate reports (rua= not set)
DKIM Selectors
✓ 1 found
google._domainkey
✓ Public key: 392 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
2 records- SPFv=spf1 include:_spf.google.com include:23400455.spf06.hubspotemail.net ~all
- proxy-ssl.webflow.com
Full email verification for letterfour.com
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