All of a sudden I stopped recieving emails from certain domains
All of a sudden I stopped receiving emails from certain domains. I can send to these domains, but not receive. A big one I can't receive from is gmail. I do an MX and DNS record check everything comes up fine. Nothing has changed on the network. The email is not even hitting my Astaro, which is what I use for email filtering, then is forwarded to exchange. The Astaro is my MX record. So the emails from gmail for example are not even hitting my network, and the gmail users have yet to get any kick back to even help troubleshoot the problem. I also have a few other domains that I can't receive email from. For the most part though we are getting all our email from other domains. This started yesterday.
ASKER CERTIFIED SOLUTION
membership
This solution is only available to members.
To access this solution, you must be a member of Experts Exchange.
if they are not even hitting your mail gateway, could thier be an issue with your ISP, are they having some issues?
I would send an email from gmail to your Email on exchagne and see if you get a bounce back
SOLUTION
membership
This solution is only available to members.
To access this solution, you must be a member of Experts Exchange.
ASKER
I called the ISP, and am waiting on a call back. If I send a test email from gmail, I don't get any kind of kick back, nor is it even hitting my Astaro (email gateway). Yes it is possible the other domains are using gmails servers.
ok that means, that Gmail is attempting to deliver the message, it will try a number of times before any NDR comes back. The fact that you indicated that email is not even reaching your gateway appliance, seems to indicate a communication problem from Gmail to you server. Most likely the ISP is having issues, or Gmail could have issues.
if you have anti-spam or anti-virus could prevent some message.
Bahloul
Bahloul
ASKER
So it was a bug in our email gateway (Sophos UTM 220). They released bad firmware. Everyone who uses a Sophos UTM, running 9-210 code were affected. The SMTP logs didn't even show these emails were being rejected, which made it very difficult to troubleshoot, especially since we were not getting any NDR. I called Sophos in desperation as I couldn't think what else it could be, and after a 2 hours of listening to their hold music, I finally got through to someone and they said it was a bug, and they were able to fix it.
ASKER
Thanks for all your help. As I stated in the last post, it was bad firmware in the Email Gateway.
ASKER