fix: change email conversation not found exception to log (#8785)

* fix: change email conversation not found exception to log

* chore: refactor reply_mailbox methods

---------

Co-authored-by: Sojan Jose <sojan@pepalo.com>

app/mailboxes/reply_mailbox.rb

@@ -6,11 +6,12 @@ class ReplyMailbox < ApplicationMailbox
   EMAIL_PART_PATTERN = /^reply\+([0-9a-f]{8}\b-[0-9a-f]{4}-[0-9a-f]{4}-[0-9a-f]{4}-\b[0-9a-f]{12})$/i
 
   before_processing :conversation_uuid_from_to_address,
-                    :find_relative_conversation,
-                    :verify_decoded_params,
-                    :decorate_mail
+                    :find_relative_conversation
 
   def process
+    return if @conversation.blank?
+
+    decorate_mail
     create_message
     add_attachments_to_message
   end
@@ -78,12 +79,8 @@ def find_by_in_reply_to_addresses(match_result, in_reply_to_addresses)
     find_conversation_by_message_id(in_reply_to_addresses) if @conversation.blank?
   end
 
-  def verify_decoded_params
-    raise 'Conversation uuid not found' if conversation_uuid.nil?
-  end
-
   def validate_resource(resource)
-    raise "Email conversation with uuid: #{conversation_uuid} not found" if resource.nil?
+    Rails.logger.error "[App::Mailboxes::ReplyMailbox] Email conversation with uuid: #{conversation_uuid} not found" if resource.nil?
 
     resource
   end