PHPMailer::setFrom( string $address, string $name = '', bool $auto = true ): bool

1382    public function setFrom($address, $name = '', $auto = true)1383    {1384        if (is_null($name)) {1385            //Helps avoid a deprecation warning in the preg_replace() below1386            $name = '';1387        }1388        $address = trim((string)$address);1389        $name = trim(preg_replace('/[\r\n]+/', '', $name)); //Strip breaks and trim1390        //Don't validate now addresses with IDN. Will be done in send().1391        $pos = strrpos($address, '@');1392        if (1393            (false === $pos)1394            || ((!$this->has8bitChars(substr($address, ++$pos)) || !static::idnSupported())1395            && !static::validateAddress($address))1396        ) {1397            $error_message = sprintf(1398                '%s (From): %s',1399                self::lang('invalid_address'),1400                $address1401            );1402            $this->setError($error_message);1403            $this->edebug($error_message);1404            if ($this->exceptions) {1405                throw new Exception($error_message);1406            }1407 1408            return false;1409        }1410        $this->From = $address;1411        $this->FromName = $name;1412        if ($auto && empty($this->Sender)) {1413            $this->Sender = $address;1414        }1415 1416        return true;1417    }