Installation 

Install this extension via Composer:

composer require traw/powermail-salesforce

Alternatively, add it to your project's composer.json file:

"require": {
    "typo3/cms-core": "^12 || ^13",
    "traw/powermail-salesforce": "^1.0"
}

If the package evoweb/extender is installed (for example as a dependency of another extension), this extension will automatically use its mechanisms to extend the Form and Field models. No additional configuration is required.

Recommended Extensions 

This extension can work together with other extensions that extend Powermail. Below is a list of extensions that I always install when using EXT:powermail where powermail-salesforce will automatically contribute its functionality:

• EXT:powermailcaptcha

  Captcha Extension for TYPO3 powermail to prevent spam https://extensions.typo3.org/extension/powermailcaptcha

• EXT:powermailautocomplete

  Add autocomplete options to powermail fields. https://extensions.typo3.org/extension/powermailautocomplete

• EXT:powermail_cond

  Add conditions (via AJAX) to powermail forms for fields and pages https://extensions.typo3.org/extension/powermail_cond