Dynamic mail configuration with values from database [Laravel]

Maybe its usefull to somebody, but I solved it as following;

In a ServiceProvider under the boot-method;

$settings = Cache::remember('settings', 60, function () {
    return Setting::pluck('value', 'name')->all();
});

config()->set('settings', $settings); // optional

config()->set('mail', array_merge(config('mail'), [
    'driver' => 'mailgun',
    'from' => [
        'address' => $settings['mail_from_address'],
        'name' => $settings['mail_from_name']
    ]
]));

config()->set('services', array_merge(config('services'), [
    'mailgun' => [
        'domain' => $settings['mailgun_domain'],
        'secret' => $settings['mailgun_secret']
    ]
]));

I used array_merge with the original config, so we only override the values we need to. Also we can use the Cache-facade in the boot-method.

Struggled for 3 days with this issue finally I figured out a way to solve it.

First I created a table mails and populated it with my values. Then I created a provider MailConfigServiceProvider.php

<?php

namespace App\Providers;

use Config;
use Illuminate\Support\Facades\DB;
use Illuminate\Support\ServiceProvider;

class MailConfigServiceProvider extends ServiceProvider
{
    /**
     * Bootstrap the application services.
     *
     * @return void
     */
    public function boot()
    {
        //
    }

    /**
     * Register the application services.
     *
     * @return void
     */
    public function register()
    {
        if (\Schema::hasTable('mails')) {
            $mail = DB::table('mails')->first();
            if ($mail) //checking if table is not empty
            {
                $config = array(
                    'driver'     => $mail->driver,
                    'host'       => $mail->host,
                    'port'       => $mail->port,
                    'from'       => array('address' => $mail->from_address, 'name' => $mail->from_name),
                    'encryption' => $mail->encryption,
                    'username'   => $mail->username,
                    'password'   => $mail->password,
                    'sendmail'   => '/usr/sbin/sendmail -bs',
                    'pretend'    => false,
                );
                Config::set('mail', $config);
            }
        }
    }
}

And then registered it in the config\app.php

App\Providers\MailConfigServiceProvider::class,

Following the instructions here is the proper solution to the problem, in case if you're sending multiple emails per request over different SMTP configurations, Config::set() won't work right, the first email will use the correct settings, while all upcoming emails within the same request will use the same configuration of the first one, because the Mail service is provided as a singleton thus only the initial configurations will be used.

This also might affect emails sent over Laravel queue workers due to the same reason.

After research a lot, finally I found the best possible way to dynamic mail configuration.

I am saving my mail configuration data in the settings table, please have a look at the table structure.

Helpers/AaapHelper.php

<?php

namespace App\Helpers;

use App\Setting;

class AppHelper
{

    public static function setMailConfig(){

        //Get the data from settings table
        $settings = Setting::pluck('description', 'label'); 

        //Set the data in an array variable from settings table
        $mailConfig = [
            'transport' => 'smtp',
            'host' => $settings['smtp_host'],
            'port' => $settings['smtp_port'],
            'encryption' => $settings['smtp_security'],
            'username' => $settings['smtp_username'],
            'password' => $settings['smtp_password'],
            'timeout' => null
        ];

        //To set configuration values at runtime, pass an array to the config helper
        config(['mail.mailers.smtp' => $mailConfig]);
    }
}

app\Http\Controllers\SettingController.php

<?php
namespace App\Http\Controllers;

use App\Helpers\AppHelper;
use Illuminate\Support\Facades\DB;
use Illuminate\Support\Facades\Mail;

class SettingController extends Controller
{

    public function sendMail()
    {
        try
        {
            //Set mail configuration
            AppHelper::setMailConfig();

            $data = ['name' => "Virat Gandhi"];

            Mail::send(['text' => 'mail'], $data, function ($message)
            {
                $message->to('[email protected]', 'Lorem Ipsum')
                    ->subject('Laravel Basic Testing Mail');
                $message->from('[email protected]', $data['name']);
            });
            return redirect()->back()->with('success', 'Test email sent successfully');
        }
        catch(\Exception $e)
        {
            return redirect()->back()->withErrors($e->getMessage());
        }
    }
}

Explanation

While sending a mail through the sendMail function it will first configure mail through helper.