howto block def. domains?

Hi, yes this is easily possible with the RegEx capability:

First, you edit antispam_bee.php as described here (search for ‘$patterns’).

For your case, you’ll want to add something like:

2 => array(
    'host' => '^(www\.)?hotmail\.com$'
)

Make sure you add a comma at the end bracket of pattern 1!

In the end it would look like this:

/* Regexp */
$patterns = array(
	0 => array(
		'host'	=> '^(www\.)?\d+\w+\.com$',
		'body'	=> '^\w+\s\d+$',
		'email'	=> '@gmail.com$'
	),
	1 => array(
		'body'	=> '\<\!.+?mfunc.+?\>'
	),
	2 => array(
		'host' => '^(www\.)?hotmail\.com$'
	)
);

Edit: Of course you have to make sure the Regular Expression (Regul?re Ausdrücke) option is checked in the Antispam Bee settings.