Domain Overview
DNS: ✓ 2mo ago
Checker: ✓ 2mo ago
acorn-paper.com
Yes
✓ Yes
Mimecast
No
No
⚠ Yes
No
No
Checked via [email protected]
· 2026-03-19 23:06:38 UTC · ↺ Refresh
MX Hostnames
- us-smtp-inbound-2.mimecast.com
- us-smtp-inbound-1.mimecast.com
MX Priorities
- us-smtp-inbound-1.mimecast.com: 10
- us-smtp-inbound-2.mimecast.com: 20
A / AAAA Records
- 23.227.38.65 ↩ myshopify.com
Mail Server IPs
- 170.10.132.221 ↩ us-smtp-inbound-1.mimecast.com
- 170.10.128.242 ↩ us-smtp-inbound-2.mimecast.com
- 170.10.132.141 ↩ us-smtp-inbound-2.mimecast.com
- 170.10.132.242 ↩ us-smtp-inbound-1.mimecast.com
- 170.10.128.221 ↩ us-smtp-inbound-1.mimecast.com
- 170.10.128.141 ↩ us-smtp-inbound-1.mimecast.com
SOA Record
Raw SOA
ns17.domaincontrol.com dns.jomax.net 2024021801 28800 7200 604800 600
Primary NS (mname)
ns17.domaincontrol.com
Admin Email (rname)
dns@jomax.net
Serial
2024021801
Refresh
28800s
Retry
7200s
Expire
604800s
Minimum TTL
600s
Nameservers (NS)
ns18.domaincontrol.com
ns17.domaincontrol.com
SPF Record
✓ Strict (-all)
v=spf1 ip4:12.16.40.226 ip4:12.148.254.216/29 ip4:12.40.104.200/29 ip4:12.232.93.104/29 ip4:12.41.78.136/29 ip4:138.1.36.217 ip4:147.154.18.119 ip4:64.37.236.0/23 ip4:205.219.85.0/24 ip4:216.182.220.0/23 include:spf.protection.outlook.com include:us._netblocks.mimecast.com include:_u.acorn-paper.com._spf.dmarclf.com -all
📊 DNS lookups: 3/10
✓ Hard fail (-all) — strict enforcement
DMARC Record
~ Quarantine
v=DMARC1; p=quarantine; rua=mailto:[email protected]; ruf=mailto:[email protected]; ri=86400; sp=quarantine; adkim=r; aspf=r; pct=100; fo=1;
~ Quarantine — good protection (failing mail goes to spam)
📋 SPF alignment: Relaxed
· DKIM alignment: Relaxed
📧 Reports → mailto:[email protected]
↳ Subdomain policy: quarantine
DKIM Selectors
✓ 2 found
selector1._domainkey
selector2._domainkey
✓ Public key: 216 chars (valid)
✓ DKIM properly configured for selector: selector1
Checked: google, selector1/2, default, mail, dkim, k1, s1/2, zoho, sendgrid, mxvault, amazonses
All TXT Records
1 record- SPFv=spf1 ip4:12.16.40.226 ip4:12.148.254.216/29 ip4:12.40.104.200/29 ip4:12.232.93.104/29 ip4:12.41.78.136/29 ip4:138.1.36.217 ip4:147.154.18.119 ip4:64.37.236.0/23 ip4:205.219.85.0/24 ip4:216.182.220.0/23 include:spf.protection.outlook.com include:us._netblocks.mimecast.com include:_u.acorn-paper.com._spf.dmarclf.com -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
See demo & docs
Deep verification
Full email verification for acorn-paper.com
SMTP handshake, catch-all detection, custom validation rules, actual deliverability tests, and more.
No credit card required
Get 1,000 Free Credits