curl --request POST \
  --url https://saas.pads365.com/rdx/nds.services.email/api/v1/mail/testSmtpConnection \
  --header 'Content-Type: application/json' \
  --data '
{
  "Server": "<string>",
  "DisableSsl": true,
  "Port": 123,
  "UserName": "<string>",
  "Password": "<string>",
  "OAuthProviderId": "<string>"
}
'

{
  "Succeeded": true,
  "Message": "<string>",
  "Code": "<string>"
}