private Message GetPop3MessageAfterParseError(Pop3Client client, int message_index)
{
var header = client.RetrieveHeaderObject(message_index);
var eml_message_string = client.RetrieveMessageString(message_index);
var message = new Message(header);
message.AddAttachmentFromString("original_message.eml", eml_message_string);
return message;
}