Part 2 Spam E-Mail Fitering:
At this point to show the magnitude of spam we are eliminating. The screen shot is at the last step in the MTA, it is a fair sampling of how much is being eliminated even at this last step in the process after going through three levels above this. So while the numbers indicate a fair amount of spam before delivery to the mail domain. The screen shot is only one of our end point mail servers and is only a 46 hour sampling.
What is becoming hard to comprehend is the vast number of viruses. We have three different companies anti-virus scanners ahead of the end point mail server and you can see that the number still being eliminated at this the fourth level. We have found that no single bit of anti-virus software on its own is acceptable. We use Avast, Symantec, Nod32, and Clam-D and find similar numbers at each level of the process. For the experts these scanners are not on the same machines in the MTA hub they are all passing through separate layers of the mail processing.
At the bottom of the graph you can see how well grey-listing works with 956,710 senders being blocked in a 46 hour period. While 40,710 valid senders were approved.
At this layer we are very confident that spam high is garbage and is directed to the bit bucket. Spam Medium is simply stamped in the subject so the end user is assured not to lose anything even remotely questionable. The domain admin can change our default settings and chose to leave this in a junk folder on the server if they want another layer of filtering.
However our MTA MX hub already allow quarantine for 14 days for questionable emails so this layer is really the last or shake out layer before mail delivery. We are using the best technologies on available to protect our enterprise clients email and offer the best possible service level available at any cost. Yet we include this with every account hosted with us. If you are looking for $3.95 month hosting you will not find it. However, if you want serious enterprise level mail filtering you will certainly find we are committed to preventing spam from reaching your in-box.
