Is it possible to filter a message programmatically to check, if a message is a spam or not?

See more:

C#

I am making a console app in visual studio 2022, where I after sending message to my gmail account, want to have criterias of whether sending the message to Inbox or to the spam folder, like spam-filtering.

Right now, I have mixed sending and the spam filtering functionality without them corresponding with each other.

I hope the question makes sense.

static bool IsSpam(string text, IEnumerable<string> wordBlacklist)
        {
            // https://www.codinghelmet.com/articles/linq-query-blacklist-spam-filter

            string pattern = @"\b[\p{L}]+\b"; // Regular expressions

            return
                Regex.Matches(text, pattern)
                    .Cast<Match>()                                // Extract matches
                    .Select(match => match.Value.ToLower())       // Convert to lower case
                    .Where(word => wordBlacklist.Contains(word))  // Find in blacklist
                    .Any();                                       // Stop when first match found

        }

        static void Main(string[] args)
        {

            var message = new MimeMessage();

            message.To.Add(MailboxAddress.Parse("blah"));

            message.Subject = "testing spam";

            message.From.Add(MailboxAddress.Parse("blah"));


            string text = "bla, bla, bla, hey";

            string[] blacklist = { "bla", "hey"};

            var builder = new BodyBuilder();

            builder.TextBody = text;

            message.Body = builder.ToMessageBody();

                  
            

            using (var smtpclient = new SmtpClient())
            {
                smtpclient.Connect("smtp.gmail.com", 587, SecureSocketOptions.StartTls);

                smtpclient.Authenticate("blah, sheesh");

                smtpclient.Send(message);

                smtpclient.Disconnect(true);
                            
            }

            try
            {
                Console.WriteLine("message sent");
            }

            catch(Exception ex)
            {
                Console.WriteLine(ex.ToString());
            }

            if (IsSpam(text, blacklist))

                Console.WriteLine("The message is spam");

            else

                Console.WriteLine("message is not spam");



        }

What I have tried:

I can send message successfully to my Inbox, and it prints correctly whether or not the message is a spam, but it needs it to filter it as spam in gmail also. I am aware, there are different techniques, when it comes to spam filtering. The one I am currently choosing is the blacklist-functionality.