Acceptable use policy

Trumailo exists to help senders keep their lists clean and their reputation healthy. That means we have to be uncompromising about preventing the service from being used to make the email ecosystem worse.

You may not use Trumailo to:

• Validate addresses scraped from public websites, dictionaries, or breach dumps without consent.
• Support phishing, credential harvesting, fraud, malware delivery, or any unlawful activity.
• Send unsolicited bulk email ("spam"), including after using Trumailo to qualify the list.
• Harass, threaten, or stalk individuals.
• Build a competing email-verification product that resells our verdicts.
• Probe, scan, or attack our infrastructure, except under a written security-research agreement.
• Circumvent rate limits, plan limits, or our spam-detection systems.
• Use the service in a country or for an end use covered by sanctions you're subject to.

We watch for patterns that almost always indicate non-consensual list usage — sudden spikes from a brand-new account, low deliverability ratios, high catch-all rates, complaints from our SMTP probe targets. Hitting one of these doesn't automatically mean we'll act, but multiple at once will get flagged for review.

• First contact: we'll email you and pause verification for new addresses.
• If the issue isn't resolved in 7 days, we may suspend the account.
• For serious or repeat violations — phishing, illegal use, scraping at scale — we'll terminate immediately and may report to authorities or ESPs.

Saw something? Email abuse@trumailo.com. We investigate every report and reply within 2 business days.