c# - Failure sending mail via Google SMTP

Question

I'm still getting "Failure sending mail." exception. The inner exception is "Unable to connect to the remote server" and the inner exception of that is "A connection attempt failed because the connected party did not properly respond after a period of time, or established connection failed because connected host has failed to respond". I'm pretty sure the cause of this is not the firewall setting. Does anyone know what I can do about it? Thanks.

var mail = new MailMessage("username@gmail.com", "destination@gmail.cz")
                        {
                            Subject = "Testing subject",
                            Body = "Testing body"
                        };
            try
            {
                var client = new SmtpClient("smtp.google.com", 465)
                                {
                                    EnableSsl = true,
                                    Credentials = new NetworkCredential("username@gmail.com", "password")
                                };
                client.Send(mail);
            }
            catch (Exception ex)
            {
                Console.WriteLine(ex.Message);
            }

Answer 1

Here is the Google settings needed:

• Incoming Mail (POP3) Server - requires SSL: pop.gmail.com

  Use SSL: Yes

  Port: 995

  Outgoing Mail (SMTP) Server - requires TLS3 or SSL: smtp.gmail.com (use authentication)

  Use Authentication: Yes

  Port for TLS/STARTTLS: 587

  Port for SSL: 465

  Account Name: your full email address (including @gmail.com or @your_domain.com)

  Email Address: your email address (username@gmail.com or username@your_domain.com)

  Password: your Gmail password