Email domain

Is instmail.uk a disposable email?

Yes. instmail.uk appears in our disposable-email domain list. This is a domain-level signal, not proof that a particular person or mailbox is fraudulent.

Domain check Listed

instmail.uk

  • Disposableyes
  • Free providerno
  • Receives mailyes
  • Mail servers7 found
  • SPFpublished
  • DMARCpublished
Risk score90
  • disposable_domaininstmail.uk hands out throwaway inboxes.

DNS facts

Domain
instmail.uk
MX records
recv300.erinn.biz, recv301.erinn.biz, recv302.erinn.biz, recv303.erinn.biz, recv304.erinn.biz, recv305.erinn.biz, recv306.erinn.biz
SPF
v=spf1 +ip4:133.130.98.68 +ip4:133.130.106.114 +ip4:133.130.89.240 +ip4:160.251.102.69 +ip4:160.251.81.146 +ip4:133.130.102.153 +ip4:160.251.107.128 +ip4:160.251.83.234 +ip4:133.130.91.161 +ip4:133.130.91.97 +ip4:133.130.108.233 +ip4:160.16.149.19 -all
DMARC
v=DMARC1; p=reject; pct=100
Checked
2026-10-21

Check another address →

Throwaway domains on the same mail servers

These listed domains share mail infrastructure with instmail.uk. Shared hosting does not establish common ownership.

Block it in code

Stop instmail.uk signups.

Check each new address and refuse when disposable is true. One call covers instmail.uk, its sister domains and new throwaway brands.

curl https://veqen-app.com/v1/email/check \
  -H "Authorization: Bearer $VEQEN_API_KEY" \
  -H "Content-Type: application/json" \
  -d '{"email": "someone@instmail.uk"}'
import os, requests

r = requests.post(
    "https://veqen-app.com/v1/email/check",
    headers={"Authorization": f"Bearer {os.environ['VEQEN_API_KEY']}"},
    json={"email": "someone@instmail.uk"},
    timeout=10,
)
result = r.json()
print(result["risk"]["verdict"], result["risk"]["reasons"])
const res = await fetch("https://veqen-app.com/v1/email/check", {
  method: "POST",
  headers: {
    Authorization: `Bearer ${process.env.VEQEN_API_KEY}`,
    "Content-Type": "application/json",
  },
  body: JSON.stringify({"email": "someone@instmail.uk"}),
});
const result = await res.json();
console.log(result.risk.verdict, result.risk.reasons);
Questions

About instmail.uk

Is instmail.uk a disposable email domain?

Yes. instmail.uk appears in our disposable-email domain list. This is a domain-level signal, not proof that a particular person or mailbox is fraudulent.

How do I block instmail.uk at signup?

Check the domain of each new address. With the Veqen API, call /v1/email/check and refuse when disposable is true; that also covers instmail.uk's sister domains and new ones.

Where does instmail.uk email go?

Its mail is handled by recv300.erinn.biz, recv301.erinn.biz, recv302.erinn.biz. 30 other throwaway domains use the same mail servers.

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