Error codes

Every failure answers application/problem+json with a stable code. Clients translate the code; the API never sends prose meant for end users.

HTTP 400

payment.provider_unavailable This payment method isn't available yet.

`auth.invalid_token`	Your session expired. Please sign in again.
`auth.invalid_credentials`	Wrong e-mail or password.
`auth.totp_required`	Enter the 6-digit code from your authenticator app.

`points.insufficient`	Not enough points. Top up your wallet.
`payment.failed`	Payment failed or expired.

`auth.forbidden`	You don't have permission to do that.
`feature.not_entitled`	Upgrade your plan to use this feature.
`domain.suspended`	This domain is suspended because your plan lapsed. Renew within 30 days to keep it.

`route.not_found`	This endpoint does not exist.
`mailbox.not_found`	This mailbox no longer exists.
`content.not_found`	This page does not exist.
`message.not_found`	This message is gone.
`attachment.not_found`	This attachment is no longer available. Large files are not kept.
`otp.not_found`	No verification code detected yet.

`mailbox.local_part_taken`	That address is already taken.
`content.key_taken`	Another block already uses that key.

`mailbox.expired`	This mailbox has expired.
`message.raw_expired`	The original is no longer kept. Downloads are available for 15 minutes, or an hour on a paid plan.

payload.too_large That attachment is too large.

`validation.failed`	Some fields are invalid.
`domain.not_available`	This domain isn't available on your plan.
`domain.limit_reached`	No domain slots left. Buy another slot to continue.
`domain.not_verified`	Domain verification is still pending.
`filter.invalid_regex`	This pattern is not supported.
`filter.limit_reached`	You reached your filter limit.

`mailbox.quota_exceeded`	You reached your mailbox limit.
`rate_limit.exceeded`	Too many requests. Try again in {seconds}s.

internal.error Server error. Support reference: {traceId}