You this you to need customize EditPost controller class below file:
Magento\Customer\Controller\Account\EditPost
In excute method below function check if email change request is sent or not
// whether a customer enabled change email option $this->processChangeEmailRequest($currentCustomerDataObject);
In processChangeEmailRequest function there is check for Password check.
/** * Process change email request * * @param \Magento\Customer\Api\Data\CustomerInterface $currentCustomerDataObject * @return void * @throws InvalidEmailOrPasswordException * @throws UserLockedException */ private function processChangeEmailRequest(\Magento\Customer\Api\Data\CustomerInterface $currentCustomerDataObject) { if ($this->getRequest()->getParam('change_email')) { // authenticate user for changing email try { $this->getAuthentication()->authenticate( $currentCustomerDataObject->getId(), $this->getRequest()->getPost('current_password') ); } catch (InvalidEmailOrPasswordException $e) { throw new InvalidEmailOrPasswordException(__('The password doesn\'t match this account.')); } } }
You can disable this function call processChangeEmailRequest by creating Around event plugin for EditPost controller.