Domain Overview
DNS: ✓ 2mo ago
Checker: ✓ 2mo ago
gdc.com
Yes
✓ Yes
Unknown
No
No
⚠ Yes
No
No
Did you mean: [email protected]
Checked via [email protected]
· 2026-03-22 07:46:52 UTC · ↺ Refresh
MX Hostnames
- mx4.bigmountainmail.com
- mx1.bigmountainmail.com
- mx2.bigmountainmail.com
- mx3.bigmountainmail.com
MX Priorities
- mx1.bigmountainmail.com: 10
- mx2.bigmountainmail.com: 20
- mx3.bigmountainmail.com: 30
- mx4.bigmountainmail.com: 40
A / AAAA Records
- 23.25.248.178 ↩ 23-25-248-178-static.hfc.comcastbusiness.net
Mail Server IPs
- 38.101.250.150 ↩ fe3-r2-in.atl06.l.antispamcloud.com
- 2001:550:2:78::ca:100 ↩ fe3-r2-in.atl06.l.antispamcloud.com
- 38.89.254.156 ↩ fe1-r2-in.ch03.l.antispamcloud.com
- 2001:550:2:61::2fc:100 (no PTR)
- 38.71.16.244 ↩ fe2-r2-in.la10.l.antispamcloud.com
- 2001:550:2:3::62:100 ↩ fe2-r2-in.la10.l.antispamcloud.com
SOA Record
Raw SOA
ns35.worldnic.com namehost.worldnic.com 126020215 10800 3600 604800 3600
Primary NS (mname)
ns35.worldnic.com
Admin Email (rname)
namehost@worldnic.com
Serial
126020215
Refresh
10800s
Retry
3600s
Expire
604800s
Minimum TTL
3600s
Nameservers (NS)
ns36.worldnic.com
ns35.worldnic.com
SPF Record
✓ Strict (-all)
v=spf1 a ip4:34.234.246.129 ip4:23.25.248.181 include:_spf.bigmountainmail.com -all
📊 DNS lookups: 2/10
✓ Hard fail (-all) — strict enforcement
DMARC Record
✗ MissingNo DMARC record — emails cannot be rejected on auth failure.
DKIM Selectors
✗ None detectedNo DKIM records found for common selectors — your provider may use a custom selector name.
Checked: google, selector1/2, default, mail, dkim, k1, s1/2, zoho, sendgrid, mxvault, amazonses
All TXT Records
1 record- SPFv=spf1 a ip4:34.234.246.129 ip4:23.25.248.181 include:_spf.bigmountainmail.com -all
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