Domain Overview
DNS: ✓ 2mo ago
Checker: ✓ 2mo ago
capitalbio.com
Yes
✓ Yes
Unknown
No
No
⚠ Yes
No
No
Checked via [email protected]
· 2026-03-14 17:55:25 UTC · ↺ Refresh
MX Hostnames
- mxw.263.net
- mx.263.net
MX Priorities
- mx.263.net: 5
- mxw.263.net: 5
A / AAAA Records
No A/AAAA records found.
Mail Server IPs
- 38.83.106.85 ↩ us-mx2.263.net
- 164.92.126.242 (no PTR)
- 143.110.227.31 (no PTR)
- 38.83.106.84 ↩ us-mx1.263.net
SOA Record
Raw SOA
marian.dnspod.net freednsadmin.dnspod.com 1773389977 3600 180 1209600 180
Primary NS (mname)
marian.dnspod.net
Admin Email (rname)
freednsadmin@dnspod.com
Serial
1773389977
Refresh
3600s
Retry
180s
Expire
1209600s
Minimum TTL
180s
Nameservers (NS)
marian.dnspod.net
barbara.dnspod.net
SPF Record
✓ Strict (-all)
v=spf1 include:spf.263xmail.com -all
📊 DNS lookups: 1/10
✓ 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
2 records- SPFv=spf1 include:spf.263xmail.com -all
- MS=D23073F2948B08AAC684757DD8BA03E2F8C97674
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