Disposable Email and Signup Fraud

Every other module in this academy is about mail a domain sends. This one is about the opposite direction: mail a business receives – specifically, signups made with a throwaway address built to leave no real trail.

What a disposable email address is

A disposable (or "temp mail") address is created at a provider specifically designed for short-lived, often anonymous use – no real account owner behind it, frequently discarded minutes after creation. They exist for legitimate privacy reasons too, which is part of why this isn't simply "block all of them" as a blanket rule – but at signup, they're also the standard tool for a specific set of abuses.

Why it matters for a business

• Trial abuse – one person creates unlimited "new" accounts to keep re-triggering a free trial, each with a fresh, disposable, unverifiable address.
• Signup-limit evasion – a promotion or allocation meant to be one-per-person gets claimed repeatedly.
• Lead-data quality – a marketing or sales pipeline fed by disposable addresses looks like real interest but converts to nothing, quietly skewing every downstream metric.
• Fraud investigation friction – when something does go wrong, there's no real contact behind the account to follow up with.

What detection actually looks like

A disposable-email check compares the domain part of a submitted address against a maintained list of known disposable-mail providers – a simple, real check to run at the point of signup, not something that requires guessing at intent from the address itself. Try ActiScan's disposable email checker against an address to see exactly how that lookup works.