[BUGFIX] fix broken blacklist check

Classes/Service/MailTemplateService.php

@@ -344,7 +344,7 @@ class MailTemplateService {
 		$isTemplateBlacklisted = self::isTemplateBlacklisted(
 			$this->extensionKey, $this->templateName, $siteRootId
 		);
-		if ($this->ignoreMailQueue && $isTemplateBlacklisted) {
+		if ($this->ignoreMailQueue && !$isTemplateBlacklisted) {
 
 			$this->mailMessage->setBody($emailBody, 'text/html');
 			$this->mailMessage->send();