Problems attempting to send email via smtp server

I'm developing an application which sends emails to the smtp.gmail.com server.

When I'm connected to an ordinary network, it works perfectly. But, the network of my company occurs the following error:

  

System.Net.WebException: Unable to connect to remote server --- > System.Net.Sockets.SocketException: A connection attempt failed because the connected component did not respond \ r \ nright after a period of time or the established connection failed \ r \ nbecause the connected host did not respond 64.233.186.108: n at System.Net.Sockets.Socket.DoConnect (EndPoint endPointSnapshot, SocketAddress socketAddress) \ r \ n at System.Net.ServicePoint.ConnectSocketInternal (Boolean connectFailure, Socket s4, Socket s6, Socket & socket, IPAddress & address, ConnectSocketState state , IAsyncResult asyncResult, Exception & exception) \ r \ n --- End of internal exception stack trace --- \ r \ n at System.Net.ServicePoint.GetConnection (PooledStream PooledStream, Object owner, Boolean async, IPAddress & address, Socket & abortSocket, Socket & abortSocket6) \ r \ n at System.Net.PooledStream.Activate (Object owningObject, Boolean async, GeneralAsyncDelegate asyncCallback) \ r \ n at System.Net.PooledStream.Activate (Object owningObject, Gen eralAsyncDelegate asyncCallback) \ r \ n at System.Net.ConnectionPool.GetConnection (Object owningObject, GeneralAsyncDelegate asyncCallback, Int32 creationTimeout) \ r \ n at System.Net.Mail.SmtpConnection.GetConnection (ServicePoint servicePoint) \ r \ n on System. Net.Mail.SmtpTransport.GetConnection (ServicePoint servicePoint) \ r \ n at System.Net.Mail.SmtpClient.GetConnection () \ r \ n at System.Net.Mail.SmtpClient.Send (MailMessage message) "

I'm using port 587 and left EnableSsl = true

Can this be because of the corporate network proxy?

Here is the snippet of the code responsible for the settings:

MailMessage mensagemEmail = new MailMessage();
mensagemEmail.From = new MailAddress(Remetente, "Novo Registro");
mensagemEmail.Subject = Assunto;
mensagemEmail.Body = enviaMensagem;
mensagemEmail.IsBodyHtml = true;

SmtpClient client = new SmtpClient("smtp.gmail.com", 587);
client.EnableSsl = true;

NetworkCredential cred = new NetworkCredential(StringsProjeto.remetente, StringsProjeto.pass);
client.Credentials = cred;

client.Send(mensagemEmail);