Live data — DNS records and disposable check were just fetched and saved.
Domain Overview
DNS: ⚡ live
Checker: ⚡ live
piperonline.net
Yes
✓ Yes
Mimecast
No
No
⚠ Yes
No
No
Checked via [email protected]
· 2026-05-21 07:32:59 UTC · ↺ Refresh
MX Hostnames
- us-smtp-inbound-2.mimecast.com
- us-smtp-inbound-1.mimecast.com
MX Priorities
No priority data.
A / AAAA Records
- 104.21.91.201
- 172.67.179.54
- 2606:4700:3035::6815:5bc9
- 2606:4700:3032::ac43:b336
Mail Server IPs
No IPs resolved.
SOA Record
No SOA record found.
Nameservers (NS)
fay.ns.cloudflare.com
fred.ns.cloudflare.com
SPF Record
✓ Strict (-all)
v=spf1 include:cfsbrands.com include:spf.constantcontact.com ip4:206.40.115.139 ip4:206.40.115.140 -all
📊 DNS lookups: 2/10
✓ Hard fail (-all) — strict enforcement
DMARC Record
✓ Reject
v=DMARC1; p=reject; sp=reject; pct=100; rua=mailto:[email protected]
✓ 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
4 records- MS=ms55898448
- knowbe4-site-verification=b49192232c3aa087cad0f0bab201b894
- SPFv=spf1 include:cfsbrands.com include:spf.constantcontact.com ip4:206.40.115.139 ip4:206.40.115.140 -all
- 1password-site-verification=JVFUCHIWDFG25EN5MYI5SDWIXA
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
See demo & docs
Deep verification
Full email verification for piperonline.net
SMTP handshake, catch-all detection, custom validation rules, actual deliverability tests, and more.
No credit card required
Get 1,000 Free Credits