Zend FR

[lang=php]
<?php
class My_Validate_BanEmail extends Zend_Validate_Abstract
{
    const BAD_EMAIL = 'badEmail';

    protected $_messageTemplates = array(
        self::BAD_EMAIL => "Using '%value%' is forbidden"
    );

    protected $_patterns = array(
        '/.@gmail.*$/',
        '/.@yahoo.*$/',
        '/.@hotmail.*$/'
    );

    /**
     * @param array $patterns
     * @return My_Validate_BanEmail
     */
    public function setPatterns($patterns)
    {
        if (is_array($patterns)) {
            $this->_patterns = $patterns;
            return $this;
        }
        $this->_patterns = array($patterns);
        return $this;
    }

    /**
     * @return array
     */
    public function getPatterns()
    {
        return $this->_patterns;
    }

    public function isValid($value)
    {
        $this->_setValue($value);
        foreach ($this->getPatterns() AS $pattern) {
            if (preg_match($pattern, $value)) {
                $this->_setValue(preg_replace('/.*@/', '', $value));
                $this->_error(self::BAD_EMAIL);
                return false;
            }
        }
        return true;
    }
}

[lang=php]
        $bansMails = new My_Validate_BanEmail();
        $bansMails->setPatterns(array(
            "/.*@domaineinterdit\.fr/",
            "/.*p0rn.*@.*/",
            "/truc@bidule\..*/"
        ));
        $this->addElement("text", "email", array(
            "label" => "E-Mail",
            "required" => true,
            "filters" => array("StringTrim"),
            "validators" => array($bansMails)
        ));