MailTumble

MailTumble is an app for securely sharing email lists, ensuring user privacy and data control through obfuscation methods.

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MailTumble is for businesses that share contact lists with vendors, marketing platforms, partners, sponsors, or customers and need to manage how those contacts are emailed. It replaces real email addresses with obfuscated addresses that relay messages, so list recipients aren’t directly exposed. You can restrict which sender addresses or domains are allowed, set rules for different senders, and control list expiry and send limits. MailTumble also records email attempts, deliveries, and errors, and can help synchronize opt-outs across mailing tools. It supports workflows such as sharing separate lists with partners and managing contact data through CSV files.

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