Add no encryption option for SMTP settings

Related to #4311

Add option to configure SMTP settings without encryption.

* Update `app/Livewire/Notifications/Email.php` and `app/Livewire/SettingsEmail.php` to include "No Encryption" option in the `smtpEncryption` field and update validation rules.
* Modify `app/Notifications/Channels/EmailChannel.php` to handle the "No Encryption" option in the `bootConfigs` method.
* Add `set_transanctional_email_settings` function in `app/Livewire/Help.php` to support the "No Encryption" option.
* Update `config/mail.php` to handle the "No Encryption" option in the mail configuration.

app/Livewire/Help.php

@@ -56,3 +56,35 @@ class Help extends Component
         return view('livewire.help')->layout('layouts.app');
     }
 }
+
+function set_transanctional_email_settings($settings = null)
+{
+    if (is_null($settings)) {
+        $settings = instanceSettings();
+    }
+
+    if ($settings->resend_enabled) {
+        config()->set('mail.default', 'resend');
+        config()->set('resend.api_key', $settings->resend_api_key);
+
+        return 'resend';
+    }
+
+    if ($settings->smtp_enabled) {
+        config()->set('mail.default', 'smtp');
+        config()->set('mail.mailers.smtp', [
+            'transport' => 'smtp',
+            'host' => $settings->smtp_host,
+            'port' => $settings->smtp_port,
+            'encryption' => $settings->smtp_encryption === 'none' ? null : $settings->smtp_encryption,
+            'username' => $settings->smtp_username,
+            'password' => $settings->smtp_password,
+            'timeout' => $settings->smtp_timeout,
+            'local_domain' => null,
+        ]);
+
+        return 'smtp';
+    }
+
+    return false;
+}

app/Livewire/Notifications/Email.php

@@ -37,7 +37,7 @@ class Email extends Component
     #[Validate(['nullable', 'numeric'])]
     public ?int $smtpPort = null;
 
-    #[Validate(['nullable', 'string'])]
+    #[Validate(['nullable', 'string', 'in:tls,ssl,none'])]
     public ?string $smtpEncryption = null;
 
     #[Validate(['nullable', 'string'])]

app/Livewire/SettingsEmail.php

@@ -19,7 +19,7 @@ class SettingsEmail extends Component
     #[Validate(['nullable', 'numeric', 'min:1', 'max:65535'])]
     public ?int $smtpPort = null;
 
-    #[Validate(['nullable', 'string'])]
+    #[Validate(['nullable', 'string', 'in:tls,ssl,none'])]
     public ?string $smtpEncryption = null;
 
     #[Validate(['nullable', 'string'])]

app/Notifications/Channels/EmailChannel.php

@@ -66,7 +66,7 @@ class EmailChannel
                 'transport' => 'smtp',
                 'host' => data_get($notifiable, 'smtp_host'),
                 'port' => data_get($notifiable, 'smtp_port'),
-                'encryption' => data_get($notifiable, 'smtp_encryption'),
+                'encryption' => data_get($notifiable, 'smtp_encryption') === 'none' ? null : data_get($notifiable, 'smtp_encryption'),
                 'username' => data_get($notifiable, 'smtp_username'),
                 'password' => data_get($notifiable, 'smtp_password'),
                 'timeout' => data_get($notifiable, 'smtp_timeout'),

config/mail.php

@@ -38,7 +38,7 @@ return [
             'transport' => 'smtp',
             'host' => env('MAIL_HOST', 'smtp.mailgun.org'),
             'port' => env('MAIL_PORT', 587),
-            'encryption' => env('MAIL_ENCRYPTION', 'tls'),
+            'encryption' => env('MAIL_ENCRYPTION', 'tls') === 'none' ? null : env('MAIL_ENCRYPTION', 'tls'),
             'username' => env('MAIL_USERNAME'),
             'password' => env('MAIL_PASSWORD'),
             'timeout' => null,