I support a small business (less than 20 users) who use the Google Apps for Business GMAIL mail protection, formerly known as Postini. for their email hygeine with an on premise Exchange 2010 server. It has been working very well up until the last few days. Many users are getting a large amount of SPAM that seems to be bypassing the GMAIL route all together.
I have the server set up to route all outbound and inbound mail through Google. I contacted their tech support and they found nothing wrong with the configuration both in the MX record and the filter settings.
I'm thinking that the receive connectors may have to be changed to support Google only. My thinking is that is the right way to go, but I found several other receive connectors:
I remember setting up Google Apps and Reinjection so that the email would come in from Google. But I'm not sure why I need Client or Default. When I read the email headers from those SPAM messages they appear NOT to go through Google.
My main question is - If I set up Google correctly in the MX records with the IP address:
Priority Points to
How are messages by passing Google and going direct to xx.xxx.xxx.xxx? (x's being used here to protect their identity)
Should I remove the other two receive connectors? Will that cause internal mail not to work?