What is SendGuard?
SendGuard is an API-first outbound firewall for AI email agents. It validates recipients, scores risk, applies policy, and can require approval before an email is sent.
Questions about AI email validation and outbound policy.
FAQ pages are useful for search snippets and AI answers when they are direct, specific, and tied to the real product behavior.
How is SendGuard different from traditional email verification?
Traditional verification answers whether an address is likely deliverable. SendGuard also asks whether this sender, agent, message, recipient, and policy context should allow the email to send now.
What decisions can the API return?
The preflight API can return allow, delay, requires_approval, or block. Responses include a risk score, confidence, reason codes, recommendations, and billing status.
What counts as a billable check?
Only checks that return a definitive billable result consume credits. Cache hits, syntax errors, unknown results, and system errors are not charged.
Can SendGuard work with existing outbound tools?
Yes. SendGuard sits before the sending step. Any tool or custom workflow that can call an API can use the decision to send, hold, delay, or block.
Does SendGuard provide legal advice?
No. SendGuard helps enforce the outbound policies you configure and produces an audit trail, but it is not legal advice.
Need the exact API shape?
Read the docs for request fields, response decisions, billing behavior, and examples.