shahine.com/omar/

homepage | Send mail to the author(s) contact

yet another Microsoft blogger

# Saturday, June 12, 2004

Mailblocks and Challenge/Response

So, I've been using Mailblocks for 2 months now and I've been meaning to write up a review of my experiences with it, but my buddy Mike did this already.

Mike highlights the big problem with mailblocks. You see they have NO SPAM filter. They simply challenge every piece of mail you get, and whomever can figure out how to prove they are human gets to have their message delivered to your inbox.

Well the problem for me is the sheer number of spams I get and the number of e-mails that are not sent by humans that I care about. I have taken the unusual approach of having all my mail forwarded to fastmail.fm, my main e-mail host, have them scan it using their spam filter (spam assassin), which gets rid of 80% of my spam, then forwarding anything else to mailblocks which gets challenged.

Well the problem is that I still have to scan my pending folder all the time to pick out mails that I care about. There are enough of these that I just don't get the value of challenge/response. Additionally, about 6 spammers a week actually go through the challenge response and I am still getting spam from them. That just sucks.

So, I have decided to discontinue my use of mailblocks and switch most everything over to my hotmail account. The reason being, hotmail has the best server side Junk Mail Filter on the market... and I am not kidding here. I get an average 5 spam messages a week in my hotmail account, which is much easier to deal with than the 30 items I day in my mailblocks pending folder (the 20% of the spam messages that fastmail's spam assassin filter does not get). I estimate that hotmail, when set to Enhanced gets about 93% of my junk with very few or zero false positives. For me, I get on average of 180 spam messages a day! So, every percent matters.

Posted Saturday, June 12, 2004    Permalink    Comments [2]  View blog reactions

 

Monday, June 28, 2004 1:34:52 AM (Pacific Daylight Time, UTC-07:00)
Hello.
I have tried nearly a dozen of spam filters. Now I use Spam Bully from http://www.spambully.com . It have an option Challenge/Response too. I activated it. When user respond I verify emails that come from Challenge/Response and if I don't want to receive emails from them I add it to Spammers List. SpamBbully impressed me with its ease of use and overall effectiveness.
I didn't used Mailblocks and I don't know how it works...
Monday, October 18, 2004 7:22:21 PM (Pacific Daylight Time, UTC-07:00)
Sounds like you didn't properly configure mailblocks. I don't get spam forwarded to me there AND you can set up 'trackers' to send things to addresses that you do not want to have to deal with a challenge/response code. My hunch is that the spams were getting through by faking your email address meaning that you setup mailblocks wrong. If you care what you did wrong contact mailblocks. Simply put, there is nothing better on the market right now BUT you have to set it up correctly (and unfortunately, it's not intuitive even to programmers.)
Daniel
Comments are closed.