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

1311    public function setFrom($address, $name = '', $auto = true)1312    {1313        $address = trim((string)$address);1314        $name = trim(preg_replace('/[\r\n]+/', '', $name)); //Strip breaks and trim1315        //Don't validate now addresses with IDN. Will be done in send().1316        $pos = strrpos($address, '@');1317        if (1318            (false === $pos)1319            || ((!$this->has8bitChars(substr($address, ++$pos)) || !static::idnSupported())1320            && !static::validateAddress($address))1321        ) {1322            $error_message = sprintf(1323                '%s (From): %s',1324                $this->lang('invalid_address'),1325                $address1326            );1327            $this->setError($error_message);1328            $this->edebug($error_message);1329            if ($this->exceptions) {1330                throw new Exception($error_message);1331            }1332 1333            return false;1334        }1335        $this->From = $address;1336        $this->FromName = $name;1337        if ($auto && empty($this->Sender)) {1338            $this->Sender = $address;1339        }1340 1341        return true;1342    }