The server committed a protocol violation The server response was:  #341

        new SmtpSender(() => new System.Net.Mail.SmtpClient("smtp.office365.com")
        {
            EnableSsl = true,
            DeliveryMethod = System.Net.Mail.SmtpDeliveryMethod.Network,
            Port = 587,
            Credentials = new System.Net.NetworkCredential("mvazini@tyt.com", "00X-0")
        });

        Email.DefaultSender = smtpSender;
        var email = Email
            .From("mvazini@tyt.com", "Customer Care")
            .To(toAddresses)               
            .Subject(subject)
            .UsingTemplate(body, new { });           
        try
        {
            var sendedEmail = await email.SendAsync();
            return sendedEmail.Successful;
        }
        catch (Exception ex)
        {
            LogManager.InsertLog(LogTypeEnum.SystemError, "Error sending e-mail for order notification." + ex.Message, ex);
            return false;
        }