CudaMail FAQ #8

Answer:

The nature of UCE (unsolicited commercial email) is that once a way has been found to defeat one method, another is found for use by the spammers. The only thing that we can do is try to minimize the spam that actually reaches the inbox. The complete solution toward this goal, also requires some action on the user's part.

Check to see if your mail server is blocking inbound port 25 connections from mail servers other than the CudaMail servers. Our Welcome letter strongly suggests that filtering be put in place to only allow inbound port 25 (SMTP) connections from the CudaMail servers (mx1 and mx2.cudamail.com) and our monitoring server at monitor.cudamail.com.

Any of the emails that have been identified as spam will have [CudaMail Tagged] in the subject line. If that isn't there, it's an indication that you haven't been blocking inbound connections, and spammers have bypassed the CudaMail protection.

If a spam message does happen to get through, you can forward us the X-ASG-Debug-ID of it and we can mark it in the Global Bayesian database. The ID can be found in the e-mail headers, and looks like the following example:

"X-ASG-Debug-ID: 1138982708-3218-174-0"

If the message does not have a X-ASG-Debug-ID then the message did not flow through the CudaMail service.