Spam Filter ISP Support Forum

  New Posts New Posts RSS Feed - Percentage Formula Question
  FAQ FAQ  Forum Search   Register Register  Login Login

Percentage Formula Question

 Post Reply Post Reply
Author
Chas View Drop Down
Newbie
Newbie


Joined: 04 August 2011
Status: Offline
Points: 2
Post Options Post Options   Thanks (0) Thanks(0)   Quote Chas Quote  Post ReplyReply Direct Link To This Post Topic: Percentage Formula Question
    Posted: 04 August 2011 at 1:09pm

Hi, 


We're trying to figure out the percentage of the effectiveness of some of the settings we currently have in place.  I'll leave the settings selected out of this note for the question is really regarding the statistics provided.



Can anyone please give me a quick explanation on the numbers below, or better yet the formula for figuring out the percentage of efffectiveness.  (I understand the defintions of the terminology, but am hoping to clear up if any of the numbers are a subset of the other numbers.)


Would it be:  

1) Emails Forwarded: 1754  /  (Emails blocked: 6246 + Email Attempts: 5814) =  % rate of 

2) Emails Forwarded: 1754  /  (Emails blocked: 6246)  =  % rate of 

 

or something else?



Total Inbound Connections Served: 6127

Emails blocked: 6246

Email Attempts: 5814

Emails Forwarded: 1754



Thanks for any info.

Chas.

Back to Top
LogSat View Drop Down
Admin Group
Admin Group
Avatar

Joined: 25 January 2005
Location: United States
Status: Offline
Points: 4068
Post Options Post Options   Thanks (0) Thanks(0)   Quote LogSat Quote  Post ReplyReply Direct Link To This Post Posted: 04 August 2011 at 7:39pm
Chas,

This stats can be a bit deceiving due to the multiple ways that SpamFilter blocks emails. For example, senders can be blocked at an IP level when they connect (via the greylist filter or the blacklist cache filter for example), or they can be blocked during the SMTP session. In addition, someone may be just be "poking" at the SMTP port to see if it's open without actually sending an email. And worse... a spammer in single connection can try to send multiple emails.

Specifically:
The "Total Inbound Connections" counts any connection made to SpamFilter, even if it's just a probe.

The "Email Attempts" counts all email attempts that resulted in a "MAIL FROM" command issued by the sender. If a sender's IP is blocked by the greylist filter or the blacklist cache however, they never get to this point and so, while the email was blocked, it's not counted under this counter.

The "Emails Blocked" counts the emails that were blocked by the various filters *except* the ones that work at the TCP level (greylist/blacklist cache).

If you'd like, if you can zip and email us one of your SpamFilter's logfiles, we can run thru it to give you a more detailed "view" on the number of spam emails that were actually blocked.
Roberto Franceschetti

LogSat Software

Spam Filter ISP
Back to Top
Chas View Drop Down
Newbie
Newbie


Joined: 04 August 2011
Status: Offline
Points: 2
Post Options Post Options   Thanks (0) Thanks(0)   Quote Chas Quote  Post ReplyReply Direct Link To This Post Posted: 08 August 2011 at 7:44pm
Hi Roberto,

Thanks for the quick reply, the explanation(s), and the offer.  I won't take you up on the offer right now, for it just seems like it would be busy work, and time is just too valuable for all that stuff.

I know we're blocking/catching/stopping more spam than our last old and dated solution, and we're very pleased with the product, and as time allows we'll fine tune it a bit more here and there.

The reason the question was asked was because I have seen a post or two on the forum of SpamFilter users claiming a 90+% catch rate, but was uncertain how they were able to figure this out.  

On our older dated system, we just entered the numbers that were presented on the statistics screen into a quick equation and came up with the blocked/caught/stopped percentage.   

It was based on that number and all the spam that the boss and other users were obviously receiving that gave us the metrics that provided the leverage for the purchase of SpamFilter.

Love the products, love the forums, and the support.  Wish there was an easier way to come up with this percentage for the powers that be, but easy come, easy go.

Who knows, perhaps a new feature or enhancement some day.

Thanks again for everything,
Chas.
Back to Top
 Post Reply Post Reply
  Share Topic   

Forum Jump Forum Permissions View Drop Down



This page was generated in 0.142 seconds.