Version 5.0.0 beta 7

system/Email/Outgoing/Smtp.php

@@ -110,7 +110,7 @@ class Smtp extends Email
 		$connection = @fsockopen( ( ( $this->smtpProtocol == 'ssl' ) ? 'ssl://' : '' ) . $this->smtpHost, $this->smtpPort, $errno, $errstr, Request::isCliEnvironment() ? VERY_LONG_REQUEST_TIMEOUT : DEFAULT_REQUEST_TIMEOUT );
 		if ( !$connection )
 		{
-			throw new Exception( $errstr, $errno );
+			throw new Exception( $errstr ?? '', $errno ?? 0 );
 		}
 		static::$smtp[ $this->connectionKey ] = $connection;
 		register_shutdown_function(function( $object ){