Domain Overview
DNS: ✓ 13d ago
Checker: ✓ 13d ago
rkschaaf.com
No
✓ Yes
Unknown
No
No
⚠ Yes
No
No
Checked via [email protected]
· 2026-05-28 04:44:14 UTC · ↺ Refresh
MX Hostnames
MX Priorities
- : 0
A / AAAA Records
- 208.91.197.27 (no PTR)
Mail Server IPs
No IPs resolved.
SOA Record
Raw SOA
edns4.ultradns.com premiumdns.support.neustar 2019073114 28800 7200 1209600 86400
Primary NS (mname)
edns4.ultradns.com
Admin Email (rname)
premiumdns@support.neustar
Serial
2019073114
Refresh
28800s
Retry
7200s
Expire
1209600s
Minimum TTL
86400s
Nameservers (NS)
ns55.ultradns2.com
ns55.ultradns2.org
edns4.ultradns.biz
edns4.ultradns.com
edns4.ultradns.net
edns4.ultradns.org
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; sp=reject; rua=mailto:[email protected]; ruf=mailto:[email protected];fo=1
✓ Reject — strongest protection
📋 SPF alignment: Relaxed
· DKIM alignment: Relaxed
📧 Reports → mailto:[email protected]
↳ Subdomain policy: reject
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
Free · No signup required
Add email validation to your forms
Block disposable emails, validate MX records, detect role accounts — unlimited, forever free.
<script src="https://check.verifyswift.com/"></script>
One line of code · Works on any site · Customize →
See demo & docs
Deep verification
Full email verification for rkschaaf.com
SMTP handshake, catch-all detection, custom validation rules, actual deliverability tests, and more.
No credit card required
Get 1,000 Free Credits