Guerrillamail Email Verification

Guerrilla Mail is a well-established disposable email service that has been operating since 2006. Unlike many disposable services, Guerrilla Mail offers several advanced features including the ability to compose and send emails (not just receive), email encryption via OpenPGP, and a self-destructing email feature where messages are automatically deleted after one hour. The service is operated as a free tool and has gained a reputation in the privacy community.

One of the distinguishing characteristics of Guerrilla Mail is its extensive network of alias domains. In addition to guerrillamail.com, the service operates guerrillamail.net, guerrillamail.org, sharklasers.com, grr.la, guerrillamailblock.com, pokemail.net, and spam4.me — all of which route to the same infrastructure. This proliferation of domains is specifically designed to make blocking more difficult, requiring verification systems to maintain comprehensive lists of all associated domains.

Guerrilla Mail provides users with a scrambled email address by default, generating random addresses to reduce the chance of inbox collision. The service supports attachments up to 150MB, making it more full-featured than many disposable alternatives. Guerrilla Mail's MX records point to its own infrastructure, and the service accepts all incoming mail regardless of the specific address used.

For email list hygiene and signup protection, all Guerrilla Mail domains should be blocked. BulkEmailChecker maintains an up-to-date database of all known Guerrilla Mail alias domains and automatically flags them during verification. The presence of any Guerrilla Mail domain in your email list indicates fraudulent signups that should be removed to protect your sender reputation and deliverability metrics.