createTransportUsingDSN example

/** * @param array<string, string> $dsns */
    public function fromStrings(array $dsns): Transports
    {
        $transports = [];
        foreach ($dsns as $name => $dsn) {
            if ($name === 'main') {
                $transports[$name] = $this->fromString($dsn);
            } else {
                $transports[$name] = $this->createTransportUsingDSN($dsn);
            }
        }

        return new Transports($transports);
    }

    public function fromString(string $dsn): TransportInterface
    {
        try {
            $transportConfig = trim($this->configService->getString('core.mailerSettings.emailAgent'));