[BUGFIX] Remove pre-checks on "transport_spool_filepath"

FileSpool uses GeneralUtility::mkdir_deep() if path does not exist.
mkdir_deep() also tries to fix permissions.
Even if this fails, there are further writable-checks down the line
in \TYPO3\CMS\Core\Mail\FileSpool constructor.

Resolves: #92303
Releases: master, 10.4, 9.5
Change-Id: I4d388ab458455eb1f940e0452fcde07967e1ca67
Reviewed-on: https://review.typo3.org/c/Packages/TYPO3.CMS/+/65748


Reviewed-by: Bernhard Berger <bernhard.berger@gmail.com>
Reviewed-by: Benni Mack <benni@typo3.org>
Reviewed-by: Daniel Goerz <daniel.goerz@posteo.de>
Tested-by: Benni Mack <benni@typo3.org>
Tested-by: Daniel Goerz <daniel.goerz@posteo.de>
Tested-by: TYPO3com <noreply@typo3.com>

typo3/sysext/core/Classes/Mail/TransportFactory.php

@@ -185,8 +185,8 @@ class TransportFactory implements SingletonInterface, LoggerAwareInterface
         switch ($mailSettings['transport_spool_type']) {
             case self::SPOOL_FILE:
                 $path = GeneralUtility::getFileAbsFileName($mailSettings['transport_spool_filepath']);
-                if (empty($path) || !file_exists($path) || !is_writable($path)) {
-                    throw new \RuntimeException('The Spool Type filepath must be available and writeable for TYPO3 in order to be used. Be sure that it\'s not accessible via the web.', 1518558797);
+                if (empty($path)) {
+                    throw new \RuntimeException('The Spool Type filepath must be configured for TYPO3 in order to be used. Be sure that it\'s not accessible via the web.', 1518558797);
                 }
                 $spool = GeneralUtility::makeInstance(FileSpool::class, $path);
                 break;