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429 Too Many Request

The account has been throttled or sync has been temporarily paused.

Causes 429 Too Many Requests API

  • Reached Nylas API limits.
  • The account has reached its sending limit with the email provider.

Solutions 429 Too Many Requests API

  • Use the Outbox Endpoint, which keeps trying to send even after a 429.
  • Retry sending with exponential backoff.

Other errors related to Throttling: