How can I disable server certificate validation in Serilog using appsettings.json?

When using the email sink in serilog I get the error

Failed to send email: System.Security.Authentication.AuthenticationException: The remote certificate is invalid according to the validation procedure.

Through code, I can supply on the EmailConnectionInfo:

ServerCertificateValidationCallback = (s, certificate, chain, sslPolicyErrors) => true

But I am using appsettings.json to load the Serilog configuration.

Is it possible to supply it through appsettings.json somehow?

I tried (stripped sensitive fields in the below example) without luck, same error:

"Serilog": {
    "Using": [ "Serilog.Sinks.Email" ],
    "MinimumLevel": "Debug",
    "WriteTo": [
      {
        "Name": "Email",
        "Args": {
          "connectionInfo": {
            "FromEmail": "",
            "ToEmail": "",
            "MailServer": "",
            "EmailSubject": "",
            "serverCertificateValidationCallback": "(s, cert, chain, sslPolicyErrors) => true"
          }
        }
      }
    ]
  }

Solution

At the moment, it is not possible to configure the ServerCertificateValidationCallback via configuration. You'll have to configure it via code.

You can open an issue in the Serilog.Settings.Configuration repository to track a feature request for configuring callbacks via configuration files and/or open an issue in the Serilog.Sinks.Email repository to see if a workaround can be implemented in the future.