Detailed SMTP setup (#6759)

* add detailed SMTP settings setup in mastodon:setup

* add localhost SMTP settings setup in mastodon:setup

* SMTP settings setup should exit after successful delivery of test mail

lib/tasks/mastodon.rake

@@ -224,6 +224,12 @@ namespace :mastodon do
       prompt.say "\n"
 
       loop do
+        if prompt.yes?('Do you want to send e-mails from localhost?', default: false)
+          env['SMTP_SERVER'] = 'localhost'
+          env['SMTP_PORT'] = 25
+          env['SMTP_AUTH_METHOD'] = 'none'
+          env['SMTP_OPENSSL_VERIFY_MODE'] = 'none'
+        else
           env['SMTP_SERVER'] = prompt.ask('SMTP server:') do |q|
             q.required true
             q.default 'smtp.mailgun.org'
@@ -244,6 +250,19 @@ namespace :mastodon do
             q.echo false
           end
 
+          env['SMTP_AUTH_METHOD'] = prompt.ask('SMTP authentication:') do |q|
+            q.required
+            q.default 'plain'
+            q.modify :strip
+          end
+
+          env['SMTP_OPENSSL_VERIFY_MODE'] = prompt.ask('SMTP OpenSSL verify mode:') do |q|
+            q.required
+            q.default 'peer'
+            q.modify :strip
+          end
+        end
+
         env['SMTP_FROM_ADDRESS'] = prompt.ask('E-mail address to send e-mails "from":') do |q|
           q.required true
           q.default "Mastodon <notifications@#{env['LOCAL_DOMAIN']}>"
@@ -261,7 +280,8 @@ namespace :mastodon do
             :user_name            => env['SMTP_LOGIN'].presence,
             :password             => env['SMTP_PASSWORD'].presence,
             :domain               => env['LOCAL_DOMAIN'],
-            :authentication       => :plain,
+            :authentication       => env['SMTP_AUTH_METHOD'] == 'none' ? nil : env['SMTP_AUTH_METHOD'] || :plain,
+            :openssl_verify_mode  => env['SMTP_OPENSSL_VERIFY_MODE'],
             :enable_starttls_auto => true,
           }
 
@@ -271,6 +291,7 @@ namespace :mastodon do
 
           mail = ActionMailer::Base.new.mail to: send_to, subject: 'Test', body: 'Mastodon SMTP configuration works!'
           mail.deliver
+          break
         rescue StandardError => e
           prompt.error 'E-mail could not be sent with this configuration, try again.'
           prompt.error e.message