Feature: Inbox greeting message (#927)

Co-authored-by: Pranav Raj S <pranav@thoughtwoot.com>

app/services/twilio/outgoing_message_service.rb

@@ -5,7 +5,7 @@ class Twilio::OutgoingMessageService
     return if message.private
     return if message.source_id
     return if inbox.channel.class.to_s != 'Channel::TwilioSms'
-    return unless message.outgoing?
+    return unless outgoing_message?
 
     twilio_message = client.messages.create(message_params)
     message.update!(source_id: twilio_message.sid)
@@ -39,6 +39,10 @@ class Twilio::OutgoingMessageService
     @channel ||= inbox.channel
   end
 
+  def outgoing_message?
+    message.outgoing? || message.template?
+  end
+
   def client
     ::Twilio::REST::Client.new(channel.account_sid, channel.auth_token)
   end