Changed important log messages to info level

Mailer.php

@@ -110,7 +110,7 @@ class Mailer extends BaseMailer
 		if (is_array($address)) {
 			$address = implode(', ', array_keys($address));
 		}
-		Yii::trace('Sending email "' . $message->getSubject() . '" to "' . $address . '"', __METHOD__);
+		Yii::info('Sending email "' . $message->getSubject() . '" to "' . $address . '"', __METHOD__);
 		return $this->getSwiftMailer()->send($message->getSwiftMessage()) > 0;
 	}