How Gumroad Migrated 100M Emails to Resend

Gumroad is a platform that enables creators to sell digital products, and they heavily rely on emails for communication with their audience. During the busy holiday season, Gumroad's email provider suddenly blocked their account, causing a critical service disruption. However, this incident prompted them to switch to Resend as their primary email provider, which helped them transform a potential crisis into an opportunity for better email infrastructure. With Resend, Gumroad was able to migrate over 100 million emails in record time and improve their deliverability by segmenting their audience into different subdomains, spacing out larger newsletter spikes, improving queueing, and setting up internal monitoring. The migration process involved coordination and planning, including a transition plan that ensured consistency and predictability. Throughout the process, Resend's customer success team provided guidance and support to help Gumroad overcome challenges and achieve their goals.

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