German B2C email decays at 2-3% monthly—but during peak churn periods (January after holidays, summer moves, GDPR re-consent campaigns), monthly decay spikes to 5-7%. German consumers frequently abandon free email accounts (GMX, Web.de), switch providers (Telekom to Vodafone), or create aliases for promotions. Disposable email usage surges around major sales events like Black Friday. ... https://www.b2clead.org/germany-email-list/