How can the user send email to me from my app ?

Ahti · 10 Feb 2016, 07:29

I have a contact tab in my app in which i want to let user type his/her email, subject and body and whenever they click on submit button the mail should be send to my email address. How can i do that ?

p3c0 · wrote on 2 Oct 2016, 07:50

@Ahti
Search for SMTP library for Qt

mrjj · 2 Oct 2016, 09:53

Like this one
https://github.com/xcoder123/SimpleSmtp_SSL_QT5

Ahti · 2 Oct 2016, 10:14

@mrjj

I actually want to create a forum which has To, From, Subject and body in it and i want user to just type his/her email in the 'From' section and whenever he/she clicks on submit button the mail should get forwarded to me. I don't want him/her to login by giving their email and password i just want them to send me the mail by just mentioning their email address. Is that possible ?

mrjj · 2 Oct 2016, 11:05

@Ahti
Well you own app can allow sending email, however you like.
BUT the server you are using for sending the emails demands login.
So your app must login it self for it to send any emails.
Due to spam, there are very few mail servers that allows sending email
anonymously these days.

Ahti · 2 Oct 2016, 14:55

@mrjj

what do you mean by my app should login first ? does that mean i should first login my email account ?

mrjj · 2 Oct 2016, 14:59

@Ahti
To be allowed to send emails via google server you need to be
authenticated. So yes, your app must "log in" to the google account you
are sending over.

Ahti · 10 Feb 2016, 15:22

@mrjj

I don't understand this why i have to login my account ? the user who is using my app sends the email to my email address now if i login my account to the users machine there is no point of it.

p3c0 · 3 Oct 2016, 09:57

@Ahti @mrjj probably meant to say that you will need an email service so that users can send an email. And this email service will provide an email gateway. To use this gateway you will need an authentication.

Ahti · P p3c0 2 Oct 2016, 17:22

@p3c0

and how can i aquire all this ?

p3c0 · 3 Oct 2016, 15:22

Have you registered to any email service ?

Ahti · P p3c0 3 Oct 2016, 10:06

@p3c0

I have an account in gmail and yahoo

VRonin · 3 Oct 2016, 15:56

When there is a library that is considered standard I tend to suggest it over some 1-man-wrapper. Not because the latter is bad but it's so much easier to find docs/examples/support when a library is very popular.

This leads me to libcurl (there are some relatively active C++ bindings like https://github.com/JosephP91/curlcpp but the core C api should be more than enough for what you are trying to do)

Here you can find an example of sending an email using gmail

Ahti · 4 Oct 2016, 04:52

@VRonin

Well that is difficult to understand and i don't know how to implement it.

Ahti · 3 Oct 2016, 16:44

@VRonin @p3c0 @mrjj

Okay guys tell me how can i simply let user to login to his/her email from my app and then let them send email to me ?? I have to get connected to the email server before i let them sign in right ?

p3c0 · wrote on 3 Oct 2016, 16:29

@Ahti Your users will use their email address only to login to you forum.
Now that you have email service and a registered user to use that service, your users will use this email user to send email to you.
You should probably maintain multiple users in case if you have a large userbase.

VRonin · A Ahti 3 Oct 2016, 16:01

@Ahti said in How can the user send email to me from my app ?:

Okay guys tell me how can i simply let user to login to his/her email from my app and then let them send email to me ?

This is even harder as you should know their mail server and sometimes you cannot really access it (for example if they use a private MS exchange server)

I put here another example with libcurl: https://curl.haxx.se/libcurl/c/smtp-mail.html

If you think it's not for you then the easy route is using QDesktopServices::openUrl("mailto:youremail@address.com");

jsulm · 4 Oct 2016, 07:39

@Ahti Why not just let the user use their preferred EMail client to send an EMail to you? See http://stackoverflow.com/questions/28674805/open-default-mail-app-from-within-qt-with-some-html
It is much easier and the user can use his/her EMail client.
You still can have a form in your app (I guess you meant form not forum?), but then you pass that data via a mailto: URL to the system, which then opens the standard EMail client and fill the data user entered in your form.

Ahti · 4 Oct 2016, 07:58

@jsulm
Okay why would he has to login from the broswer and then use my app to send email to me ? Can't he simply login to his email account from my app and send mail to me from my app ? And yes i meant form not forum sorry for the mistake. And i used that "QDesktopService..." And it opens up MS outlook.

mrjj · 5 Oct 2016, 14:14

Ok. listen. we need to talk about sending emails.

A program cannot just send email. It need the help of
a mail server. That is another PC that has a post office program.
Like GMAIL is. its a mail service.

So for your program to send mails, you need to send via such server.

That can happen

1: You pop outlook via QDesktopService and the mail is sent over whatever server outlook is using.

2: You send via a google account that your program knows username and password for.
So before sending email via GOOGLE you will login to this account inside the program.
This is part of the SMTP protocol.

3: You use some online mail service where you can send email via some API.

You could also ask user to login to his mail service but I would never give my password to any unknown program so it's not a good solution and also teaches the users to do stupid things.

So the part you need to understand is that Sending email demands that the MAIL server knows who u are. So the programs need to supply username and password to the MAil server
to be allowed to send anything.