1、概述
源码放在文章末尾
该项目实现了邮件的批量发送，如下图所示：
项目部分代码如下所示：
#ifndef SMTPCLIENT_H
#define SMTPCLIENT_H#include <QtGui>
#include <QtNetwork>
#if (QT_VERSION >= QT_VERSION_CHECK(5,0,0))
#include <QtWidgets>
#endif
#include "mimemessage.h"class SmtpClient : public QObject
{Q_OBJECT
public:enum AuthMethod {AuthPlain,AuthLogin};enum SmtpError {ConnectionTimeoutError,ResponseTimeoutError,AuthenticationFailedError,ServerError, // 4xx smtp errorClientError // 5xx smtp error};enum ConnectionType {TcpConnection,SslConnection,TlsConnection // STARTTLS};SmtpClient(const QString &host = "locahost", int port = 25, ConnectionType ct = TcpConnection);~SmtpClient();const QString &getHost() const;void setHost(QString &host);int getPort() const;void setPort(int port);const QString &getName() const;void setName(const QString &name);ConnectionType getConnectionType() const;void setConnectionType(ConnectionType ct);const QString &getUser() const;void setUser(const QString &host);const QString &getPassword() const;void setPassword(const QString &password);SmtpClient::AuthMethod getAuthMethod() const;void setAuthMethod(AuthMethod method);const QString &getResponseText() const;int getResponseCode() const;int getConnectionTimeout() const;void setConnectionTimeout(int msec);int getResponseTimeout() const;void setResponseTimeout(int msec);QTcpSocket *getSocket();bool connectToHost();bool login();bool login(const QString &user, const QString &password, AuthMethod method = AuthLogin);bool sendMail(MimeMessage &email);void quit();protected:QTcpSocket *socket;QString host;int port;ConnectionType connectionType;QString name;QString user;QString password;AuthMethod authMethod;int connectionTimeout;int responseTimeout;QString responseText;int responseCode;class ResponseTimeoutException {};void waitForResponse();void sendMessage(const QString &text);signals:void smtpError(SmtpError e);};#endif // SMTPCLIENT_H
