improve SMTP configs form

app/controllers/email_settings_controller.rb

@@ -7,10 +7,16 @@ class EmailSettingsController < ApplicationController
 
   def create
     if @encrypted_config.update(storage_configs)
+      SettingsMailer.smtp_successful_setup(@encrypted_config.value['from_email']).deliver_now!
+
       redirect_to settings_email_index_path, notice: 'Changes have been saved'
     else
       render :index, status: :unprocessable_entity
     end
+  rescue Net::SMTPError, OpenSSL::SSL::SSLError, Net::ReadTimeout => e
+    flash[:alert] = e.message
+
+    render :index, status: :unprocessable_entity
   end
 
   private

app/javascript/application.scss

@@ -70,3 +70,7 @@ button[disabled] .enabled {
 .base-radio {
   @apply radio bg-white radio-sm no-animation;
 }
+
+.base-select {
+  @apply select base-input w-full font-normal;
+}

app/mailers/settings_mailer.rb

@@ -0,0 +1,7 @@
+# frozen_string_literal: true
+
+class SettingsMailer < ApplicationMailer
+  def smtp_successful_setup(email)
+    mail(to: email, subject: 'SMTP has been configured')
+  end
+end

app/views/accounts/show.html.erb

@@ -11,13 +11,13 @@
         <div class="grid md:grid-cols-2 gap-4">
           <div class="form-control">
             <%= ff.label :timezone, class: 'label' %>
-            <%= ff.select :timezone, nil, {}, class: 'select base-input w-full font-normal' do %>
+            <%= ff.select :timezone, nil, {}, class: 'base-select' do %>
               <%= time_zone_options_for_select(current_account.timezone) %>
             <% end %>
           </div>
           <div class="form-control">
             <%= ff.label :locale, 'Time format', class: 'label' %>
-            <%= ff.select :locale, options_for_select(controller.class::LOCALE_OPTIONS.invert, current_account.locale), {}, class: 'select base-input w-full font-normal' %>
+            <%= ff.select :locale, options_for_select(controller.class::LOCALE_OPTIONS.invert, current_account.locale), {}, class: 'base-select' %>
           </div>
         </div>
       <% end %>

app/views/email_settings/index.html.erb

@@ -25,6 +25,27 @@
             <%= ff.password_field :password, value: value['password'], required: true, class: 'base-input' %>
           </div>
         </div>
+        <div class="grid md:grid-cols-2 gap-4">
+          <div class="form-control">
+            <%= ff.label :domain, 'Domain (optional)', class: 'label' %>
+            <%= ff.text_field :domain, value: value['domain'], class: 'base-input' %>
+          </div>
+          <div class="form-control">
+            <%= ff.label :authentication, class: 'label' %>
+            <%= ff.select :authentication, options_for_select([%w[Plain plain], %w[Login login], %w[CRAM-MD5 cram_md5]], value.fetch('authentication', 'plain')), { prompt: true }, required: true, class: 'base-select' %>
+          </div>
+        </div>
+        <div class="form-control">
+          <%= ff.label :security_label, 'SMTP Security', class: 'label' %>
+          <div class="flex items-center space-x-6">
+            <% [%w[None none], %w[SSL ssl], %w[TLS tls]].each do |(label, val)| %>
+              <%= ff.label :security, value: val, for: "#{val}_radio", class: 'label' do %>
+                <%= ff.radio_button :security, val, checked: (value['security'].blank? && val == 'none') || value['security'] == val, id: "#{val}_radio", class: 'base-radio mr-2' %>
+                <%= label %>
+              <% end %>
+            <% end %>
+          </div>
+        </div>
         <div class="form-control">
           <%= ff.label :from_email, 'Send from Email', class: 'label' %>
           <%= ff.email_field :from_email, value: value['from_email'], required: true, class: 'base-input' %>

app/views/settings_mailer/smtp_successful_setup.html.erb

@@ -0,0 +1 @@
+<p>SMTP has been successfully configured!</p>