我的邮件发件人不会向某人发送电子邮件

Question

我创建了一个发送Email的方法，如：

public async Task SendEmailCC(string body, string subject, List<string> mainRecievers, List<string> receivers)
    {
        SmtpClient client = new SmtpClient("smtp-mail.outlook.com")
        {
            UseDefaultCredentials = true,
            Port = 587,
            EnableSsl = true,
            DeliveryMethod = SmtpDeliveryMethod.Network,
            Credentials = new NetworkCredential("Test@gmail.com", "MyMailPassword")
        };

        MailMessage mailMessage = new MailMessage { From = new MailAddress("job@test.org") };

        foreach (var reciever in mainRecievers)
        {
            mailMessage.To.Add(reciever);
        }

        foreach (var item in receivers)
        {
            mailMessage.CC.Add(item);
        }

        mailMessage.Body = body;
        mailMessage.IsBodyhtml = true;
        mailMessage.Subject = subject;

        await client.SendMailAsync(mailMessage);
    }

为了测试，我发送电子邮件给我自己，但我没有得到Email。我怎么才能找到我的问题？