Fix: fixing mail to and in_reply_to issues (#3451)

app/mailboxes/reply_mailbox.rb

@@ -26,7 +26,11 @@ class ReplyMailbox < ApplicationMailbox
   end
 
   def conversation_uuid_from_to_address
-    mail.to.each do |email|
+    @mail = MailPresenter.new(mail)
+
+    return if @mail.mail_receiver.blank?
+
+    @mail.mail_receiver.each do |email|
       username = email.split('@')[0]
       match_result = username.match(ApplicationMailbox::REPLY_EMAIL_UUID_PATTERN)
       if match_result
@@ -37,10 +41,6 @@ class ReplyMailbox < ApplicationMailbox
     @conversation_uuid
   end
 
-  def verify_decoded_params
-    raise 'Conversation uuid not found' if conversation_uuid.nil?
-  end
-
   # find conversation uuid from below pattern
   # reply+<conversation-uuid>@<mailer-domain.com>
   def find_conversation_with_uuid
@@ -73,6 +73,10 @@ class ReplyMailbox < ApplicationMailbox
     end
   end
 
+  def verify_decoded_params
+    raise 'Conversation uuid not found' if conversation_uuid.nil?
+  end
+
   def validate_resource(resource)
     raise "#{resource.class.name} not found" if resource.nil?