(DataFlex) Yahoo Mail - SMTP, IMAP, POP Authentication with App Password

See more Yahoo Mail Examples

An application can read and send email from Yahoo mail accounts, but now it must use an "application password" rather then the account owner's password.

Let's say your application is "Xyz". Each Yahoo Mail account owner would first need to go to the "Account Security" tab in her Yahoo Mail account settings and create an App Password. It is the App Password that is used with SMTP, IMAP, and POP instead of the normal account password. The Yahoo Mail account owner can choose to create individual app passwords, one for each app, or can create a single app password that she might use for all apps. Ultimately, this is just a way to allow the user to associate passwords with individual apps such that a password for an individual app can be changed or revoked without affecting other apps. This is also better security. It's the same idea as using a password manager. Rather than using the same password for all online accounts, each individual account has a generated password that is managed by a password manager service or program with a single master password.

Chilkat ActiveX Downloads ActiveX for 32-bit and 64-bit Windows

Use ChilkatAx-win32.pkg

Procedure Test
    Handle hoImap
    Boolean iSuccess
    String sMyYahooEmailAddress
    String sMyGeneratedAppPassword
    Handle hoMailman
    Variant vEmail
    Handle hoEmail
    String sTemp1

    // This example requires the Chilkat API to have been previously unlocked.
    // See Global Unlock Sample for sample code.

    // To authenticate with Yahoo Mail in SMTP, IMAP, or POP, the full email address is the username, and a generated app password is the password.
    // See Yahoo Mail Generate and manage third-party app passwords

    // The information at the above linked web page is:
    // Some older, third-party email apps (that do not use our Yahoo branded sign-in page) require you to enter a single password for login credentials. 
    // To access your Yahoo Mail account on these apps, you'll need to generate and use an app password. 
    // An app password is a long, randomly generated code that gives a non-Yahoo app permission to access your Yahoo account. 
    // You�ll only need to provide this code once to sign in to your third-party email app.
    // 
    // Generate an app password
    // 
    //     Sign in to your Yahoo Account Security page.
    //     Click Generate app password or Generate and manage app passwords.
    //     Enter your app's name in the text field.
    //     Click Generate password.
    //     Follow the instructions below the app password.
    //     Click Done.
    // 
    // Use this app password and your email address to sign in to your email app.

    // ------
    // NOTE: The comment "You�ll only need to provide this code once to sign in to your third-party email app." is assuming your app
    // is persisting the user's password such that it re-uses it to authenticate each time it connects to the mail server.
    // All SMTP, IMAP, or POP sessions must authenticate with each new connection/session.
    // ------

    // First, let's demonstrate IMAP...
    Get Create (RefClass(cComChilkatImap)) To hoImap
    If (Not(IsComObjectCreated(hoImap))) Begin
        Send CreateComObject of hoImap
    End
    Set ComPort Of hoImap To 993
    Set ComSsl Of hoImap To True
    Get ComConnect Of hoImap "imap.mail.yahoo.com" To iSuccess
    If (iSuccess = False) Begin
        Get ComLastErrorText Of hoImap To sTemp1
        Showln sTemp1
        Procedure_Return
    End

    Move "joe@yahoo.com" To sMyYahooEmailAddress
    Move "lrabkaprvntxdjmc" To sMyGeneratedAppPassword

    // Sign into the app/service using your normal username
    // Instead of your normal password, enter the app password above
    Get ComLogin Of hoImap sMyYahooEmailAddress sMyGeneratedAppPassword To iSuccess
    If (iSuccess = False) Begin
        Get ComLastErrorText Of hoImap To sTemp1
        Showln sTemp1
        Procedure_Return
    End

    Get ComSelectMailbox Of hoImap "Inbox" To iSuccess
    If (iSuccess = False) Begin
        Get ComLastErrorText Of hoImap To sTemp1
        Showln sTemp1
        Procedure_Return
    End

    Showln "Yahoo IMAP all good!"
    Get ComDisconnect Of hoImap To iSuccess

    // --------------------------------------------
    // Now do Yahoo SMTP:

    Get Create (RefClass(cComChilkatMailMan)) To hoMailman
    If (Not(IsComObjectCreated(hoMailman))) Begin
        Send CreateComObject of hoMailman
    End

    Set ComSmtpHost Of hoMailman To "smtp.mail.yahoo.com"

    Set ComSmtpUsername Of hoMailman To sMyYahooEmailAddress
    Set ComSmtpPassword Of hoMailman To sMyGeneratedAppPassword

    Set ComSmtpSsl Of hoMailman To True
    Set ComSmtpPort Of hoMailman To 465

    Get Create (RefClass(cComChilkatEmail)) To hoEmail
    If (Not(IsComObjectCreated(hoEmail))) Begin
        Send CreateComObject of hoEmail
    End
    Set ComSubject Of hoEmail To "This is a test"
    Set ComBody Of hoEmail To "This is a test"
    Set ComFromName Of hoEmail To "Joe"
    Set ComFromAddress Of hoEmail To sMyYahooEmailAddress
    // Please change the recipient before running this code..
    Get ComAddTo Of hoEmail "Chilkat" "info@chilkatsoft.com" To iSuccess

    Get pvComObject of hoEmail to vEmail
    Get ComSendEmail Of hoMailman vEmail To iSuccess
    If (iSuccess <> True) Begin
        Get ComLastErrorText Of hoMailman To sTemp1
        Showln sTemp1
        Procedure_Return
    End

    Get ComCloseSmtpConnection Of hoMailman To iSuccess
    If (iSuccess <> True) Begin
        Showln "Connection to SMTP server not closed cleanly."
    End

    Showln "Yahoo Mail Sent!"

    // ------------------------------------
    // Now do Yahoo POP3

    Set ComMailHost Of hoMailman To "pop.mail.yahoo.com"

    Set ComPopUsername Of hoMailman To sMyYahooEmailAddress
    Set ComPopPassword Of hoMailman To sMyGeneratedAppPassword

    Set ComMailPort Of hoMailman To 995
    Set ComPopSsl Of hoMailman To True

    Get ComPop3Connect Of hoMailman To iSuccess
    If (iSuccess <> True) Begin
        Get ComLastErrorText Of hoMailman To sTemp1
        Showln sTemp1
        Procedure_Return
    End

    Get ComPop3Authenticate Of hoMailman To iSuccess
    If (iSuccess <> True) Begin
        Get ComLastErrorText Of hoMailman To sTemp1
        Showln sTemp1
        Procedure_Return
    End

    Showln "Connected and authenticated with Yahoo POP Mail Server."


End_Procedure