Yes. Guerrillamail.biz is a known disposable email service, so block it at signup. Mailboxes expire within minutes and any existing Guerrillamail.biz account should be treated as a fraud signal.
Every check returns one of three clear outcomes so you know exactly what to do with the address.
The mailbox exists and accepts mail. Send with confidence, the address is deliverable.
The mailbox does not exist, is disposable, or will hard-bounce. Remove it to protect your sender reputation.
The server is catch-all or greylisting, so existence cannot be confirmed. Send selectively and watch engagement.
guerrillamail.biz publishes 1 MX record. The primary mail exchanger is mail.guerrillamail.biz, hosted by guerrillamail.biz, and it is currently reachable and answering SMTP. Mail is routed through these servers in priority order, lowest number first.
| Priority | Hostname | IP | Status |
|---|---|---|---|
| 1 | mail.guerrillamail.biz | 178.162.170.166 | Reachable |
220 mail.guerrillamail.com SMTP Guerrilla(v1.6.1) #97149411 (129) 2026-05-29T23:11:51ZNo. guerrillamail.biz is a disposable email service. Its mailboxes are throwaway and expire within minutes, so addresses on this domain are not safe to accept or send to. Block it at signup and treat existing guerrillamail.biz accounts as a fraud signal.
Addresses on Guerrillamail.biz are throwaway inboxes that expire within minutes. Accepting them inflates your user count, wastes onboarding spend, and damages sender reputation when the mailboxes bounce.
Each address runs through 30+ checks including SMTP existence, catch-all detection, role-account filtering, and disposable matching. The same engine has verified billions of addresses since 2012.
Every unverified address is a gamble. Here is what happens when you skip verification and mail a list that has not been cleaned.
Disposable signups skew your activation rate, growth metrics, and analytics with users who never come back.
Welcome series and drip campaigns all fire at a guerrillamail.biz inbox that has already been discarded.
Throwaway addresses are the standard tool for free-trial farming, multi-accounting, and bot signups.
Mail to expired guerrillamail.biz inboxes bounces, and bounce rate is one of the first signals mailbox providers punish.
Guerrillamail.biz is disposable email, registered through Cloudflare, Inc. and first seen Oct 4, 2007.
Guerrillamail.biz is disposable email, classified as disposable email running on guerrillamail.biz. It operates 1 mail server and currently accepts SMTP connections.
Because guerrillamail.biz is disposable, every address should be blocked at signup. Mailboxes expire within minutes, so any existing guerrillamail.biz account in your database is a strong fraud signal worth removing.
Upload a CSV or TXT list of Guerrillamail.biz addresses to the bulk email verifier. Every address runs through a live SMTP handshake plus catch-all, role-account and disposable detection, and you download a clean list when processing completes. For real-time checks at signup, use the real-time email verification API.
CSV or TXT with one email per line. No formatting needed.
Each Guerrillamail.biz address is checked with a live server handshake.
Get a verified list with status codes, risk flags, and catch-all detection.
Pay as you go. No subscriptions, and credits never expire.
Everything about verifying email at this domain.
While guerrillamail.biz functions as an email domain, it is classified as a disposable or temporary email service. Emails sent to guerrillamail.biz addresses are short-lived and should not be trusted.
Yes, guerrillamail.biz is a known disposable email provider. Addresses on this domain are temporary and should be blocked in registration forms to prevent fake signups.
guerrillamail.biz operates its own temporary mail infrastructure designed for disposable email addresses. Check the MX records section for details.
No, you should not send marketing emails to guerrillamail.biz addresses. Disposable addresses are temporary and will stop functioning. Sending to these domains wastes resources.
While guerrillamail.biz addresses may pass SMTP verification, they should be flagged and rejected. Use BulkEmailChecker disposable domain detection to block guerrillamail.biz automatically.
Upload a CSV or TXT list to the bulk email verifier. Every address runs through 30+ checks including SMTP existence, catch-all detection, role-account, and disposable matching. Processing time depends on list size.
99.7% accurate using a direct SMTP handshake with guerrillamail.biz's mail servers, the same engine that has verified billions of addresses since 2012.
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