!1. Google Mail OAuth 2.0\\
__Google Mail__ through __SMTP__/__IMAP__ requires __OAuth 2.0__ ([OAuth Wikipedia Link|https://en.wikipedia.org/wiki/OAuth]) for authentication. (More information : [Google IMAP-SMTP Link|https://developers.google.com/gmail/imap/imap-smtp]).\\
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__!!! Proxy Configuration:__ If your server accesses the internet through a proxy, make sure to whitelist the following domains for Google Mail Authentication:\\	
• oauth2.googleapis.com\\
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Start by navigating to Google APIs & Services: [Google APIs & Services Link|https://console.developers.google.com/projectselector/apis/credentials]\\
__!!!Note:__ Ensure sure the __GMAIL API__ is enabled at __Enabled APIs & services__. [Google API Library Link|https://console.cloud.google.com/apis/library]\\
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[SMTP Google Mail Integration/g_api_services.png]\\
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[SMTP Google Mail Integration/gmail_api_enabled.png]\\
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Go to the __Credentials__ menu, click on __Create Credentials__, and select __OAuth client ID__:\\
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[SMTP Google Mail Integration/create_credentials.png]\\
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Select the application type: __Web application__. Provide a unique name. Then, configure the __Authorized redirect URI__—this is where Google will redirect you after authorization. The Redirect URL must end with __?command=register_google_mail_api__.\\
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{{{

    http://127.0.0.1:9090/?command=register_google_mail_api
}}}\\
or
{{{
    
    https://your.crushftp.domain.com/?command=register_google_mail_api
    
}}}\\
Finally, click the __Create__ button.\\
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[attachments|credential_config.png]\\
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After the credentials are created, copy the __Client ID__ and __Client Secret__.\\
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[SMTP Google Mail Integration/client_id_secret.png]\\
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!2. SMTP Settings\\
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Navigate to __Server Admin__ -> __Preferences__ -> [General Settings] -> __SMTP Settings__:\\
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[SMTP Google Mail Integration/smtp_config.png]\\
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__SMTP Server Used for Emailing__: Enter the SMTP server address used for sending emails, such as __smtp.gmail.com__, using the default port __587__.\\
{{{
    smtp.gmail.com:587
}}}\\
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__SMTP Server Username, Password__: If the SMTP server address ends with __gmail.com__, the corresponding __Get Refresh Token__ button will appear. Click that button to proceed.\\
__!!! Note__: To obtain the __Refresh Token__, the CrushFTP WebInterface’s host and port must match the __Redirect URL__ specified in the __Google APIs & Services__-> __Credentials__ -> __OAuth 2.0 Client IDs__. In our example, it was: http://127.0.0.1:9090 or https://your.crushftp.domain.com/\\
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Enter the __Client ID__ , __Client Secret__. Proceed with the authentication and authorization process. __!!! Note__: Be sure to sign in with the __Google Account__ that has the __necessary permissions__, as configured in the __Google APIs & Services__-> __Credentials__ -> __OAuth 2.0 Client IDs__. This will automatically configure the __SMTP Server Username__ and __SMTP Server Password__.\\
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[attachments|oauth_form.png]\\
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If the domain is unverified, a warning message may appear. Click __Advanced__ and choose to proceed:\\ 
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[SMTP Google Mail Integration/not_verified_domain.png]\\
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Click on the __Allow__ button:\\
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[SMTP Google Mail Integration/allow_form.png]\\
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__From email address__: You must also specify the __From__ email address. __!!! Imnportant__ The __From__ address must exactly match __the signed-in Google user’s email address__ (i.e., the account used to obtain the refresh token). Otherwise, SMTP authentication will fail.\\ 
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Make sure to enable the __SSL/TLS__ flag to ensure a secure connection.\\
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----
!3. PopImapTask\\
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Select the __IMAPS__ protocol.\\
See the description: [Google IMAP-SMTP Link|https://developers.google.com/gmail/imap/imap-smtp]\\
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__Host:__\\
{{{
    imap.gmail.com
}}}
__Port__: __993__\\
If the __Host__ contains __gmail.com__, the corresponding __Get Refresh Token__ button will appear.\\
Configure the __1. Google Mail OAuth 2.0__ [Link|https://www.crushftp.com/crush11wiki/Wiki.jsp?page=SMTP%20Google%20Mail%20Integration#section-SMTP+Google+Mail+Integration-1.GoogleMailOAuth2.0]\\
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__!!! Note__: To obtain the Refresh Token, the CrushFTP WebInterface’s host and port must match the Redirect URL specified in the __Google APIs & Services__-> __Credentials__ -> __OAuth 2.0 Client IDs__. In our example, it was: http://127.0.0.1:9090 or https://your.crushftp.domain.com/\\
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Enter the __Client ID__ , __Client Secret__. Proceed with the authentication and authorization process. __!!! Note__: Be sure to sign in with the __Google Account__ that has the __necessary permissions__, as configured in the __Google APIs & Services__-> __Credentials__ -> __OAuth 2.0 Client IDs__. This will automatically configure the PopImapTask's __Mail Username__ and __Mail Password__.\\
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[attachments|oauth_form.png]\\
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If the domain is unverified, a warning message may appear. Click __Advanced__ and choose to proceed:\\ 
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[SMTP Google Mail Integration/not_verified_domain.png]\\
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Click on the __Allow__ button:\\
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[SMTP Google Mail Integration/allow_form.png]\\
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__!!!Note:__ Since the email address is required after obtaining the refresh token, the Mail Username field must be adjusted.\\
Enter your email address followed by a tilde (~) at the beginning of the Mail Username field.\\
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{{{
Mail Username : <<your email address>>~<<what was before>> 
}}}
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[attachments|pop_imap_task.png]\\
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More info: [Link| https://www.crushftp.com/crush11wiki/Wiki.jsp?page=CrushTask#section-CrushTask-POP3IMAP]\\
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