Permissions of uploaded files (Azure Websites)

For some reason the files uploaded to ‘wpcf7_uploads’ have 600 permissions. Then, they aren’t removed, neither the folders which contain them.
‘wpcf7_uploads’ and folders inside it have 755 permissions.

To solve this I had to change the permissions of the file to be removed in the function ‘wpcf7_rmdir_p( $dir )’ (includes/functions.php):

function wpcf7_rmdir_p( $dir ) {
	if ( is_file( $dir ) ) {
	    chmod($dir, 0644); // new line
            @unlink( $dir );
	    return true;
	}
       ....
}

Any better solution? WordPress is running on Azure Websites. I don’t know why the files are being uploaded with 600 permissions :/

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