Domain Overview
DNS: ✓ 2mo ago
Checker: ✓ 2mo ago
donsheatingandcooling.com
Yes
✓ Yes
Unknown
No
No
⚠ Yes
No
No
Checked via [email protected]
· 2026-03-25 10:31:06 UTC · ↺ Refresh
MX Hostnames
- tsunami16.surfnusa.net
MX Priorities
- tsunami16.surfnusa.net: 0
A / AAAA Records
- 192.95.20.61 ↩ montreal300.wpcloud.ca
Mail Server IPs
- 108.174.96.236 ↩ tsunami16.surfnusa.net
SOA Record
Raw SOA
ns0.directnic.com hostmaster.ns0.directnic.com 2022081600 28800 14400 604800 86400
Primary NS (mname)
ns0.directnic.com
Admin Email (rname)
hostmaster@ns0.directnic.com
Serial
2022081600
Refresh
28800s
Retry
14400s
Expire
604800s
Minimum TTL
86400s
Nameservers (NS)
ns0.directnic.com
ns3.directnic.com
ns1.directnic.com
ns2.directnic.com
SPF Record
✓ Strict (-all)
v=spf1 +mx +a -all
📊 DNS lookups: 2/10
✓ Hard fail (-all) — strict enforcement
DMARC Record
✓ Reject
v=DMARC1; p=reject; rua=mailto:[email protected]
✓ Reject — strongest protection
📋 SPF alignment: Relaxed
· DKIM alignment: Relaxed
📧 Reports → mailto:[email protected]
DKIM Selectors
✓ 1 found
default._domainkey
✓ Public key: 216 chars (valid)
✓ DKIM properly configured for selector: default
Checked: google, selector1/2, default, mail, dkim, k1, s1/2, zoho, sendgrid, mxvault, amazonses
All TXT Records
1 record- SPFv=spf1 +mx +a -all
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