Domain Overview
DNS: ✓ 2mo ago
Checker: ✓ 2mo ago
penguinstrategies.com
Yes
✓ Yes
Google
No
No
⚠ Yes
No
No
Checked via [email protected]
· 2026-03-23 11:37:47 UTC · ↺ Refresh
MX Hostnames
- smtp.google.com
MX Priorities
- smtp.google.com: 1
A / AAAA Records
- 199.60.103.108 (no PTR)
- 199.60.103.8
Mail Server IPs
- 142.250.31.26 ↩ bj-in-f26.1e100.net
- 172.253.122.26 ↩ bh-in-f26.1e100.net
- 172.253.122.27 ↩ bh-in-f27.1e100.net
- 172.253.63.27 ↩ bi-in-f27.1e100.net
- 172.253.63.26 ↩ bi-in-f26.1e100.net
- 2607:f8b0:4004:c09::1b ↩ bh-in-f27.1e100.net
- 2607:f8b0:4004:c08::1b ↩ bi-in-f27.1e100.net
- 2607:f8b0:4004:c08::1a ↩ bi-in-f26.1e100.net
- 2607:f8b0:4004:c09::1a ↩ bh-in-f26.1e100.net
SOA Record
Raw SOA
dns1.stableserver.net postmaster.stableserver.net 2026012216 10800 3600 604800 3600
Primary NS (mname)
dns1.stableserver.net
Admin Email (rname)
postmaster@stableserver.net
Serial
2026012216
Refresh
10800s
Retry
3600s
Expire
604800s
Minimum TTL
3600s
Nameservers (NS)
ns4.stableserver.net
ns3.stableserver.net
ns2.stableserver.net
ns1.stableserver.net
SPF Record
✓ Strict (-all)
v=spf1 include:433607.spf01.hubspotemail.net include:_spf.google.com -all
📊 DNS lookups: 2/10
✓ Hard fail (-all) — strict 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
1 record- SPFv=spf1 include:433607.spf01.hubspotemail.net include:_spf.google.com -all
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