namespace Grand.Business.Core.Enums.Messages;

public enum SecureSocketOptions
{
    //
    // Summary:
    //     No SSL or TLS encryption should be used.
    None = 0,

    //
    // Summary:
    //     Allow the MailKit.IMailService to decide which SSL or TLS options to use (default).
    //     If the server does not support SSL or TLS, then the connection will continue
    //     without any encryption.
    Auto = 1,

    //
    // Summary:
    //     The connection should use SSL or TLS encryption immediately.
    SslOnConnect = 2,

    //
    // Summary:
    //     Elevates the connection to use TLS encryption immediately after reading the greeting
    //     and capabilities of the server. If the server does not support the STARTTLS extension,
    //     then the connection will fail and a System.NotSupportedException will be thrown.
    StartTls = 3,

    //
    // Summary:
    //     Elevates the connection to use TLS encryption immediately after reading the greeting
    //     and capabilities of the server, but only if the server supports the STARTTLS
    //     extension.
    StartTlsWhenAvailable = 4
}