Send email by SMTP

JonB

@Volker75
Hi. I am sure your information is useful, and OP should try your video. I am sorry but I do not watch any videos, if your was a text/code post I would happily read it. I do now vaguely remember about creating a password at Google side, Is this all to do with https://forum.qt.io/topic/134839/gmail-smtp-authentication/17 ?

But in order to keep the functionality you have now, you need to enable 2FA and generate the "less secure app" credentials. That's the scope of the changes you face, if I read the situation correctly.

If you want to guide this OP through what he has to do at the Qt side programatically at the client (in addition to set up at Gmail side), please do so!

Volker75

@JonB No problem. Yes, I am showing in the video how to create a new password and how to enable the 2FA. It is pretty hidden in the google settings. Difficult to explain with text only. You can see it in a video much better.
In the c++ source it is easy. I also just use that simple-mail GitHub repository. The manual there is short and easy. Enabling the 2FA on google took me the most time.

Saee1101

I did set password and 2FA for from@gmail.com

Smtp *newmail=new Smtp("from@gmail.com","to@gmail.com","Test","Hi,I'm QtCreator");

I'm sure enter password for "from@gmail.com" . but I don't know how do it ?

Volker75

@Saee1101 Just by

newmail.setPassword(password);

Saee1101

@Volker75

#ifndef SMTP_H
#define SMTP_H

#include <QTcpSocket>
#include <QString>
#include <QTextStream>
#include <QDebug>
#include <QMessageBox>
#include <QTextEdit>

class Smtp : public QObject
{
    Q_OBJECT


public:
    Smtp( const QString &from, const QString &to,
    const QString &subject, const QString &body );
    ~Smtp();
QString base64Encode(const QString &plainText);
signals:
    void status( const QString &);

public slots:
    void stateChanged();
    void errorReceived();
    void disconnected();
    void connected();
    void readyRead();

private:
    QString message;
    QTextStream *t;
    QTcpSocket *socket;
    QString from;
    QString rcpt;
    QString response;
     QTextEdit *output;
    enum states{Rcpt,Mail,Data,Init,Body,Quit,Close};
    int state;

};
#endif

do you see setPassword ?!

Volker75

@Saee1101 Well, you should
#include "../../src/SmtpMime"

Did you saw the "demo" folder? Check out demo4.cpp and do it exactly like that.

Saee1101

This post is deleted!

Saee1101

@Volker75
I do Enable POP for all mail or Enable POP for mail that arrives from now on. Screenshot 1.png
Application Output :

host : "smtp.gmail.com"
port : 587
ssl : false
auth : false
user : "test.tivanex@gmail.com"
password : "nkjs **** **** ****"
[SmtpClient] State: ConnectingState
[Socket] State: QAbstractSocket::HostLookupState
[Socket] State: QAbstractSocket::ConnectingState
[Socket] State: QAbstractSocket::ConnectedState
[SmtpClient] State: ConnectedState
[Socket] IN:  "220 smtp.gmail.com ESMTP ti10-20020a170907c20a00b00a360ba43173sm370123ejc.99 - gsmtp\r\n"
[SmtpClient] State: _EHLO_State
[Socket] OUT: "EHLO localhost"
[Socket] IN:  "250-smtp.gmail.com at your service, [109.125.166.7]\r\n"
[Socket] IN:  "250-SIZE 35882577\r\n"
[Socket] IN:  "250-8BITMIME\r\n"
[Socket] IN:  "250-STARTTLS\r\n"
[Socket] IN:  "250-ENHANCEDSTATUSCODES\r\n"
[Socket] IN:  "250-PIPELINING\r\n"
[Socket] IN:  "250-CHUNKING\r\n"
[Socket] IN:  "250 SMTPUTF8\r\n"
[SmtpClient] State: _READY_Connected
[SmtpClient] State: ReadyState
[SmtpClient] State: MailSendingState
[SmtpClient] State: _MAIL_0_FROM
[Socket] OUT: "MAIL FROM:<test.tivanex@gmail.com>"
[Socket] IN:  "530-5.7.0 Must issue a STARTTLS command first. For more information, go to\r\n"
[Socket] IN:  "530-5.7.0  https://support.google.com/a/answer/3221692 and review RFC 3207\r\n"
[Socket] IN:  "530 5.7.0 specifications. ti10-20020a170907c20a00b00a360ba43173sm370123ejc.99 - gsmtp\r\n"
QWindowsWindow::setGeometry: Unable to set geometry 120x30+805+451 (frame: 136x69+797+420) on QWidgetWindow/"QErrorMessageClassWindow" on "\\.\DISPLAY1". Resulting geometry: 203x124+805+451 (frame: 219x163+797+420) margins: 8, 31, 8, 8 minimum size: 203x124 MINMAXINFO maxSize=0,0 maxpos=0,0 mintrack=219,163 maxtrack=0,0)

Help me ,please
Help me ,please
Help me ,please

JonB

@Saee1101 said in Send email by SMTP:

Help me ,please
Help me ,please
Help me ,please

?

Have you acted on what the output error message tells you that you need to do, to send mail via this server?

Saee1101

@JonB
NO , I don't know what to do , actually ?

JonB

@Saee1101

530-5.7.0 Must issue a STARTTLS command first.

The server is telling you that you are trying to send a message unencrypted, but it requires encryption and won't just send in plain text. You can see from earlier that one of the commands it accepts is STARTTLS, and you need to issue that from your client.

I can't recall the details, you may wait for other responses. But I think after you send the initial EHLO greeting you then send a STARTTLS. And then I think you have to set up to use SSL socket. An example is at https://stackoverflow.com/questions/34215231/send-email-with-starttls, it's for Java but you get the idea. I'm sure you can get a better one by Googling for smtp starttls example, e.g. https://stackoverflow.com/questions/22957189/smtp-send-mail-with-qtcpsocket for Qt. If you looked at/are using https://github.com/bluetiger9/SmtpClient-for-Qt I see that mentions it has support for STARTTLS.