Georg Ringer authored Oct 19, 2020 and Daniel Goerz committed Oct 20, 2020

The method :php`\TYPO3\CMS\Core\Utility\GeneralUtility::validEmail`
is used to validate a given email address through the core
and TYPO3 extensions.

The validation can now be configured by providing the used
validators to be used in the LocalConfiguration.php or
AdditionalConfiguration.php.

Example:

   $GLOBALS['TYPO3_CONF_VARS']['MAIL']['validators'] = [
     \Egulias\EmailValidator\Validation\RFCValidation::class,
     \Egulias\EmailValidator\Validation\DNSCheckValidation::class'
   ];

The RFCValidation validator is still be used as default.

Furthermore, following validators are available:

- Egulias\EmailValidator\Validation\DNSCheckValidation
- Egulias\EmailValidator\Validation\SpoofCheckValidation
- Egulias\EmailValidator\Validation\NoRFCWarningsValidation

It is also possible to provide own validators which must implement
the Egulias\EmailValidator\Validation\EmailValidation interface.

If multiple validators are provided, each validator must return TRUE.

Resolves: #92531
Releases: master
Change-Id: I9c5a0573c2f9bff56bf869dc221a2c0ffd75417b
Reviewed-on: https://review.typo3.org/c/Packages/TYPO3.CMS/+/66179


Tested-by: Oliver Bartsch <bo@cedev.de>
Tested-by: TYPO3com <noreply@typo3.com>
Tested-by: Daniel Goerz <daniel.goerz@posteo.de>
Reviewed-by: Oliver Bartsch <bo@cedev.de>
Reviewed-by: Josef Glatz <josefglatz@gmail.com>
Reviewed-by: Daniel Goerz <daniel.goerz@posteo.de>