delphi - 使用 gmail 和 Indy 发送电子邮件

Question

我正在尝试使用 gmail 从 Delphi 发送电子邮件。我有 Indy 10.5.9.0 和 Delphi XE3。

示例代码来自: http://www.andrecelestino.com/delphi-xe-envio-de-e-mail-com-componentes-indy/

我也尝试了其他示例代码，但结果相同。

我从这里获得了 libeay32.dll 和 ssleay32.dll: http://www.andrecelestino.com/wp-content/files/DLLs-SSL-DelphiXE.rar但我也试过: http://indy.fulgan.com/SSL/openssl-1.0.2d-i386-win32.zip没有运气。

我的代码(完整):

uses
  Windows, Messages, SysUtils, Variants, Classes, Graphics, Controls, Forms,
  Dialogs, StdCtrls, ComCtrls, IdBaseComponent, IdComponent, IdTCPConnection,
  IdTCPClient, IdExplicitTLSClientServerBase, IdMessageClient, IdSMTPBase, IdMessage,
  IdSMTP, IdIOHandler, IdIOHandlerSocket, IdIOHandlerStack, IdSSL, IdSSLOpenSSL, IdText;






procedure TForm1.Button1Click(Sender: TObject);
var
  // variáveis e objetos necessários para o envio
  IdSSLIOHandlerSocket: TIdSSLIOHandlerSocketOpenSSL;
  IdSMTP: TIdSMTP;
  IdMessage: TIdMessage;
  IdText: TIdText;
  sAnexo: string;
begin
  // instanciação dos objetos
  IdSSLIOHandlerSocket := TIdSSLIOHandlerSocketOpenSSL.Create(Self);
  IdSMTP := TIdSMTP.Create(Self);
  IdMessage := TIdMessage.Create(Self);

  try
    // Configuração do protocolo SSL (TIdSSLIOHandlerSocketOpenSSL)
    IdSSLIOHandlerSocket.SSLOptions.Method := sslvSSLv23;
    IdSSLIOHandlerSocket.SSLOptions.Mode := sslmClient;

    // Configuração do servidor SMTP (TIdSMTP)
    IdSMTP.IOHandler := IdSSLIOHandlerSocket;
    IdSMTP.UseTLS := utUseImplicitTLS;
    IdSMTP.AuthType := satDefault;
    IdSMTP.Port := 465;
    IdSMTP.Host := 'smtp.gmail.com';
    IdSMTP.Username := 'MYLOGIN@gmail.com';
    IdSMTP.Password := 'MYPASS';

    // Configuração da mensagem (TIdMessage)
    IdMessage.From.Address := 'MYLOGIN@gmail.com';
    IdMessage.From.Name := 'John Smith';
    IdMessage.ReplyTo.EMailAddresses := IdMessage.From.Address;
    IdMessage.Recipients.Add.Text := 'receiver@example.com';
    IdMessage.Subject := 'Hello World';
    IdMessage.Encoding := meMIME;

    // Configuração do corpo do email (TIdText)
    IdText := TIdText.Create(IdMessage.MessageParts);
    IdText.Body.Add('The body of the e-mail goes here');
    IdText.ContentType := 'text/plain; charset=iso-8859-1';


    // Conexão e autenticação
    try
      IdSMTP.Connect;
      IdSMTP.Authenticate;
    except
      on E:Exception do
      begin
        MessageDlg('Cannot authenticate: ' +
          E.Message, mtWarning, [mbOK], 0);
        Exit;
      end;
    end;

    // Envio da mensagem
    try
      IdSMTP.Send(IdMessage);
      MessageDlg('Message sent successfully!', mtInformation, [mbOK], 0);
    except
      On E:Exception do
      begin
        MessageDlg('Error while sending a message: ' +
          E.Message, mtWarning, [mbOK], 0);
      end;
    end;
  finally
    // liberação dos objetos da memória
    FreeAndNil(IdMessage);
    FreeAndNil(IdSSLIOHandlerSocket);
    FreeAndNil(IdSMTP);
  end;
end;

但我只从 Gmail 收到此错误:

https://accounts.google.com/ContinueSignIn?sarp=1&scc=1sdf[...]请通过您的网络浏览器登录并然后再试一次。 了解更多信息 https://support.google.com/mail/answer/78754 t1sm2526415lcc.25 - gsmtp

我确实登录了 https://accounts.google.com/ContinueSignIn?sarp=1&scc=1sdf[...]但我什么都没告诉我。

Answer 1

这是因为 Google 阻止了这种登录方式。因此，在花了 10 个小时三次检查代码中的每个可能设置后，我找到了这个页面:

https://www.google.com/settings/security/lesssecureapps

并为“不太安全的应用程序”启用访问权限。

更新:

之后尝试使用 Delphi 发送电子邮件，如果失败，请登录您的 Gmail 帐户并访问以下 2 个页面:

https://myaccount.google.com/device-activity

https://myaccount.google.com/secureaccount

并确认这个新的“未知设备”是您本人(这是您的 Delphi 应用程序)。