Google Mail require OAUTH2 for authentication. It requires several steps to configure.
You will start at the API credentials manager:
https://console.developers.google.com/projectselector/apis/credentials
You first need to make a project.  My example calls this CrushFTP-Test.

Add new attachment
Only authorized users are allowed to upload new attachments.
List of attachments
| Kind | Attachment Name | Size | Version | Date Modified | Author | Change note | 
|---|---|---|---|---|---|---|
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      allow_form.png | 132.3 kB | 2 | 13-May-2025 04:28 | krivacsz | |
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      client_id_secret.png | 96.8 kB | 3 | 15-May-2025 07:06 | krivacsz | |
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      consent_settings_1.png | 128.9 kB | 1 | 05-Dec-2023 05:32 | krivacsz | |
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      consent_settings_2.png | 42.5 kB | 1 | 05-Dec-2023 05:32 | krivacsz | |
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      create_consent.png | 108.6 kB | 1 | 05-Dec-2023 05:32 | krivacsz | |
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      create_credentials.png | 181.1 kB | 2 | 05-Dec-2023 05:32 | krivacsz | |
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      create_project.png | 25.9 kB | 1 | 05-Dec-2023 05:32 | krivacsz | |
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      credential_config.png | 160.4 kB | 4 | 06-Jun-2025 05:27 | krivacsz | |
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      credential_config_gdrive.png | 166.7 kB | 2 | 06-Jun-2025 07:36 | krivacsz | |
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      g_api_services.png | 95.9 kB | 1 | 13-May-2025 01:59 | krivacsz | |
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      gmail_api_enabled.png | 42.1 kB | 1 | 23-Apr-2025 10:00 | krivacsz | |
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      not_verified_domain.png | 111.6 kB | 1 | 05-Dec-2023 05:32 | krivacsz | |
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      oauth_consent.png | 49.1 kB | 1 | 05-Dec-2023 05:32 | krivacsz | |
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      oauth_form.png | 61.3 kB | 1 | 05-Dec-2023 05:32 | krivacsz | |
png  | 
      pop_imap_task.png | 134.8 kB | 1 | 14-May-2025 02:22 | krivacsz | |
png  | 
      smtp_config.png | 50.7 kB | 2 | 13-May-2025 04:54 | krivacsz | 
 
    
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      This particular version was published on 05-Dec-2023 05:32 by krivacsz.
    
   
  
   
    
  
    
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