TYPO3 Core

The Test Mail Feature uses settings form the backend core extension, but the behaviour has changed:

At TYPO3 11.5.1 The Configured Path of the "login.loginLogo (string)" could be relative or with the extension prefix so these paths should be valid:

The Description:

If set, this logo will be used instead of the TYPO3 logo above the login credential fields 
(e.g. fileadmin/images/login-logo.png or EXT:my_theme/Resources/Public/Images/login-logo.png or //domain.tld/login-logo.png).

At TYPO3 11.5.3 The Configured Path of the "login.loginLogo (string)" could be relative or with the extension prefix also, so these paths should be still valid.

For the backend extension these settings are ok but not for the Test Mail!!

If you try to send a Testmail with a path like filedamin/blah/file.png at the backend extension a error appears:

Could not deliver mail
Please verify $GLOBALS['TYPO3_CONF_VARS']['MAIL'][*] settings are valid. Error message: Resource paths must start with "EXT:" 

So at 11.5.3 a path like filedamin/blah/file.png isnt valid, if these behaviour ist expected, the Description for the logo path should be fixed