Using tipafriend, the system returns the error message: "The message was not sent.
The message was not sent due to an unknown error. Please notify the site administrator about this error." although the email has been successfully received.

We fixed it moving lib/ezutils/classes/ezsmtptransport.php line 112 into the foreach loop.

                foreach ( $smtp->errors as $error )
                {
                    eZDebug::writeError( "Error sending SMTP mail: " . $error, "eZSMTPTransport::sendMail()" );
                  $mailSent = false;
					 }

Maybe there is a better way to fix this.

Steps to reproduce

Use tipafriend functionality