Disposable Email Domain Study
An analysis of disposable and temporary email domains, why they appear in signups, and how detection protects list quality and metrics.
Key findings
800+
Disposable domains tracked by Mailthentic
Source: Mailthentic
Minutes
Typical lifespan of a disposable mailbox
Source: Industry benchmark
Near zero
Conversion from disposable signups
Source: Industry benchmark
Why disposable addresses appear
People use throwaway addresses to claim a discount, download gated content or dodge a signup wall. The mailbox is abandoned quickly, so the address inflates your list, never converts, and often goes dead within hours.
The cost to your program
Disposable signups distort activation and funnel metrics, waste send spend, and contribute to bounces as the mailboxes expire. Detecting them at signup keeps your data and your reputation clean.
Detection in practice
Detection works by matching the domain against a maintained list of known disposable providers. Mailthentic checks every verification against 800+ such domains and flags them in real time via the API or in bulk.
Methodology
Based on the Mailthentic disposable-domain database and widely-cited industry observations about temporary mailbox behavior. The domain count reflects the maintained Mailthentic list.
Frequently asked questions
How are disposable domains detected?
Can I block disposable signups in real time?
Put the data to work
Verify your list and protect deliverability with 1,000 free credits.