Domain Overview
DNS: ✓ 2mo ago
Checker: ✓ 2mo ago
emails.xfinity.com
No
None
Unknown
No
No
⚠ Yes
No
No
Checked via [email protected]
· 2026-03-21 06:56:57 UTC · ↺ Refresh
MX Hostnames
No MX records found.
MX Priorities
No priority data.
A / AAAA Records
No A/AAAA records found.
Mail Server IPs
No IPs resolved.
SOA Record
Raw SOA
dns101.comcast.net dnsadmin.comcast.net 39 7200 3600 604800 900
Primary NS (mname)
dns101.comcast.net
Admin Email (rname)
dnsadmin@comcast.net
Serial
39
Refresh
7200s
Retry
3600s
Expire
604800s
Minimum TTL
900s
Nameservers (NS)
dns103.comcast.net
dns104.comcast.net
dns105.comcast.net
dns101.comcast.net
dns102.comcast.net
SPF Record
✗ Invalid
v=spf1 -all
📊 DNS lookups: 0/10
⚠ Strict -all with no allowed senders — no servers can send email for this domain.
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
✗ 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 -all
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