在smtp/中发送邮件失败smtp服务器需要安全连接，或者客户端未通过身份验证

我正在尝试重置密码并恢复密码功能。因此，我使用smtp方式发送邮件。然而，我在尝试接球时出错了。

Error Occured: Failure sending mail.

我也不确定我应该在web.config文件的哪一部分添加这个连接代码

<network host="smtp.gmail.com" enableSsl="true"  />

下面是我在使用smtp逻辑时与Azure数据库的连接。

protected void btnSubmit_Click(object sender, EventArgs e)
    {
        string uniqueCode = string.Empty;
        SqlCommand cmd = new SqlCommand();
        SqlDataReader dr;
        try
        {
            SqlConnection con = new SqlConnection(ConfigurationManager.ConnectionStrings["ConnectionString"].ConnectionString);
            if (con.State == ConnectionState.Closed)
            {
                con.Open();
            }
            // get the records matching the supplied username or email id.         
            cmd = new SqlCommand("select * from MemberAccount where nric COLLATE Latin1_general_CS_AS=@nric or email COLLATE Latin1_general_CS_AS=@email", con);
            cmd.Parameters.AddWithValue("@nric", Convert.ToString(txtUserName.Text.Trim()));
            cmd.Parameters.AddWithValue("@email", Convert.ToString(txtEmailId.Text.Trim()));
            dr = cmd.ExecuteReader();
            cmd.Dispose();
            if (dr.HasRows)
            {
                dr.Read();
                //generate unique code
                uniqueCode = Convert.ToString(System.Guid.NewGuid());
                //Updating an unique random code in then UniquCode field of the database table
                cmd = new SqlCommand("update MemberAccount set UniqueCode=@uniqueCode where nric=@nric or email=@email", con);
                cmd.Parameters.AddWithValue("@uniqueCode", uniqueCode);
                cmd.Parameters.AddWithValue("@nric", txtUserName.Text.Trim());
                cmd.Parameters.AddWithValue("@email", txtEmailId.Text.Trim());
                StringBuilder strBody = new StringBuilder();
                //Passing emailid,username and generated unique code via querystring. For testing pass your localhost number and while making online pass your domain name instead of localhost path.
                strBody.Append("<a href=http://sipolice.azurewebsites.net/MemberRecoverPassword.aspx" + txtEmailId.Text + "&uName=" + txtUserName.Text + "&uCode=" + uniqueCode + ">Click here to change your password</a>");
                // sbody.Append("&uCode=" + uniqueCode + "&uName=" + txtUserName.Text + ">Click here to change your password</a>");
                System.Net.Mail.MailMessage mail = new System.Net.Mail.MailMessage("SenderEmailIAddress@hotmail.com", dr["email"].ToString(), "Reset Your Password", strBody.ToString());
                //pasing the Gmail credentials to send the email
                System.Net.NetworkCredential mailAuthenticaion = new System.Net.NetworkCredential("SenderEmailIAddress@hotmail.com", "SenderPassword");
                System.Net.Mail.SmtpClient mailclient = new System.Net.Mail.SmtpClient("smtp.hotmail.com", 587);
                mailclient.EnableSsl = true;
                mailclient.Credentials = mailAuthenticaion;
                mail.IsBodyHtml = true;
                mailclient.Send(mail);
                dr.Close();
                dr.Dispose();
                cmd.ExecuteReader();
                cmd.Dispose();
                con.Close();
                lblStatus.Text = "Reset password link has been sent to your email address";
                txtEmailId.Text = string.Empty;
                txtUserName.Text = string.Empty;
            }
            else
            {
                lblStatus.Text = "Please enter valid email address or username";
                txtEmailId.Text = string.Empty;
                txtUserName.Text = string.Empty;
                con.Close();
                return;
            }
        }
        catch (Exception ex)
        {
            lblStatus.Text = "Error Occured: " + ex.Message.ToString();
        }
        finally
        {
            cmd.Dispose();
        }
    }

更新我刚刚意识到为什么它不能工作。它不起作用，因为我的帐户信息不正确