An error occurred while attempting to establish an SSL or TLS connection.

Question

Boa tarde, estou com algum caso que alguns clientes estão recebendo a seguinte mensagem ao tentarem enviar email por uma conta do outlook em maquina com Windows 11 PRO : "An error occurred while attempting to establish an SSL or TLS connection.

This usually means that the SSL certificate presented by the server is not trusted by the system for one or more of

the following reasons:

1. The server is using a self-signed certificate which cannot be verified.
2. The local system is missing a Root or Intermediate certificate needed to verify the server's certificate.
3. A Certificate Authority CRL server for one or more of the certificates in the chain is temporarily unavailable.
4. The certificate presented by the server is expired or invalid.
5. The set of SSL/TLS protocols supported by the client and server do not match.

See https://github.com/jstedfast/MailKit/blob/master/FAQ.md#SslHandshakeException for possible solutions."

alguem sabe dizer porque estar retornando essa mensagem?