Disposable provider profile
Is guerrillamail.biz a disposable email domain?
Yes. guerrillamail.biz is operated by Guerrilla Mail, a temporary inbox. Guerrillamail.biz extends the Guerrilla Mail domain cluster into the .biz namespace, again purely to widen the pool of addresses that evade blocks. It offers the same anonymous, short-lived public inbox as every other domain in the family. Seeing it signals a user reaching for a less-obvious throwaway.
Why block or review guerrillamail.biz
Disposable inbox domains can create low-quality or unreachable accounts.
Because Guerrilla Mail inboxes are publicly accessible and generated on demand, an address on guerrillamail.biz rarely represents a durable customer. Segment it before billing, onboarding, CRM enrichment, or campaign sends so it does not inflate your signup counts or your bounce rate.
What to do next
- Separate addresses using guerrillamail.biz from normal business and consumer inboxes.
- Run a full verification pass before sending campaigns or approving important product accounts on Guerrilla Mail.
- Apply stricter rules for signup, abuse prevention, and free-trial flows than for low-risk newsletters.
How Verifly flags guerrillamail.biz
When you verify an address on guerrillamail.biz, the Verifly API returns is_disposable: true inside the response details, so you can auto-route it before it reaches your list.
# Check guerrillamail.biz with the Verifly API
curl -X GET "https://verifly.email/api/v1/verify?email=someone@guerrillamail.biz" \
-H "Authorization: Bearer vf_your_api_key"
# Response includes:
# "details": { "is_disposable": true, ... }
# Guerrilla Mail addresses are flagged is_disposable: trueFrequently asked questions about guerrillamail.biz
Why so many Guerrilla Mail domains?
Each new TLD gives users a fresh address to slip past domain blocks.
Does guerrillamail.biz differ in behavior?
No, it is the same temporary-inbox service.
Should guerrillamail.biz be blocked?
Yes, as part of the full Guerrilla Mail family.
Related disposable domains
See the full disposable domain listThis page profiles a known disposable provider; it is not a final deliverability verdict for a specific address. Verifly can verify the actual mailbox and show deeper signals before you import or send. Try the email risk checker.