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12% of all online form submissions now use disposable email addresses (BulkEmailChecker research, 2025) 46M+: monthly visits to Temp-Mail.org alone, making it one of the most visited privacy tools globally 5M+: disposable emails identified in a single year by ZeroBounces validation API, preventing an equivalent number of bounces (ZeroBounce Email List Decay Report, 2025) 23%: average annual email list decay rate across all industries (ZeroBounce, 2025), with disposable emails contributing a measurable share 19% of signups at certain SaaS platforms use disposable addresses, according to Hypertxt research (December 2025) 30% of free-tier signups are estimated to be bots or users hiding behind disposable emails (AbstractAPI, 2026) What Happens When Disposable Emails Enter Your List The damage from disposable email addresses is multi-layered and compounds over time: Hard bounces: When a disposable address expires (in minutes or hours), any subsequent email sent to it generates a hard bounce

2013 paper (PMID: 23055539) has an Expression of Concern issued by the journal in 2021, and the Benoist et al

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Many commercial formulations are stable at room temperature