Hi everyone,

Recently, our transactional emails won’t launch and return HTTPoison.Error like :
%HTTPoison.Error{reason: {:options, :incompatible, [verify: :verify_peer, cacerts: :undefined]}, id: nil}

I’m using the Brevo API V3. And my guess is that’s a problem with SSL; I currently use [ssl: [{:versions, [:"tlsv1.2"]}]].

Any idea or lead to help me on this case?

Thanks.

UPDATE :
Linked to OTP 26 upgrade. I obtain some progress by changing my request otps like :

  def process_request_options(_options) do
    [
      ssl: [
        verify: :verify_peer,
        cacerts: :public_key.cacerts_get(),
        versions: [:"tlsv1.2"]
      ]
    ]

Now the error is :
%HTTPoison.Error{reason: {:tls_alert, {:handshake_failure, ~c"TLS client: In state certify at ssl_handshake.erl:2140 generated CLIENT ALERT: Fatal - Handshake Failure\n {bad_cert,hostname_check_failed}"}}, id: nil}