MailboxValidator integrations and automation

Describe what should happen in MailboxValidator, and when, in plain words. Whenever builds the workflow and runs it on a schedule, on a webhook, or when another app sends an event.

Connection requirements, provider permissions and optional AI usage apply. Read the runtime limits.

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MailboxValidator on Whenever

About MailboxValidator

MailboxValidator checks email addresses for syntax, deliverability, mail-server availability, and free or disposable provider status.

How Whenever connects

Through its API, using the credentials and permissions required by the provider.

Build it from your AI client

Connect Claude, Cursor or Codex to the Whenever MCP server and your coding agent can build and deploy the MailboxValidator workflow. It runs on Whenever afterwards, on its schedule or webhook, with the chat closed.

Set up the Whenever MCP server