Errors › 422 Unprocessable

inbox_connection_failed

Clement couldn't log in to the SMTP or IMAP server you supplied.

What happened

`POST /v1/inboxes/smtp` verifies both logins before saving anything. The message says which server failed and why (rejected credentials, TLS setup, unreachable host); `param` is `smtp` or `imap`. Port 25 is never supported.

How to recover

Check host, port and security (465/ssl or 587/starttls for SMTP, 993/ssl or 143/starttls for IMAP) and use an app password where the provider requires one, then retry.

See all errors · API reference