NDR's getting thru

[kiddx]

So we have a proxmox setup and its handling all smtp traffic, and we have it set to do a name check (450). However, it looks like someone is spamming out as us and we are getting thousands of NDRs and they keep coming in even though the user does not exist in our system. They end up in the outbound queue and then in the admin box as NDR internally.

Thanks

 

[dietmar]

So we have a proxmox setup and its handling all smtp traffic, and we have it set to do a name check (450). However, it looks like someone is spamming out as us and we are getting thousands of NDRs and they keep coming in even though the user does not exist in our system.

If you verify recievers proxmox reject mails to unknown users. Are you sure you configured that correctly?

They end up in the outbound queue and then in the admin box as NDR internally.

Why do the end up in the outbound queue? Do you have an example of such an NDR (preferable eml/raw format)?

- Dietmar

 

[kiddx]

On the exchange server, someone took off the filter for recipents who are not in active directory. We updated that and see if that fixes the issue, if not i will repost the NDR message header.

Thanks