Skycon Talk – Email Filtering

7 comments

1. Hey how are you,
   Just read your presentation.
   Surprising to see that the TOP 5 contains 4 european countries. Even more since the EU has stated that spam is not to be tolerated anymore and is a criminal offense.
   Something that is not really clear to me (but you know im not native English ;)). Do you or don’t you submit back your scores to blacklists ?
   Anyway very clear story, when will the webcast be available 😉
   Rob

2. Rob
   Don’t forget that a lot of spam comes from infected PCs, so the actual source of the spam may not be in Europe (it might be)
   Automated reporting of spam can be quite dangerous, but we do manually submit samples to spamcop and uribl
   Michele

3. Yeah that is why asked about the submission !
   I thought be reading your presentation that you automated that.

4. Good presentation Michele – quick one tho – I assume Blacknight doesnt spam/virus filter -all- it’s customer’s email? As you’re estimate of 100k-300k mail users on your network would require vast scanning resources?

5. I think they do indeed scan all mails from their clients. Perhaps for some windows users they dont..

6. Well, from our experience, we offer scanning as an optional extra, and see levels requiring 4 way xeon servers roughly per 10k users. 300k users would need 120 cpu’s just to process the spam/viruses, not to mention storage for qurantine, etc. Doing spam filtering and virus checking well is extremely difficult, especially when the end users expectation is that mail will not be delayed.

7. Stephen
   We’ve always done filtering for ALL of our linux hosting accounts. While this does mean we need to use beefier hardware our setup is very different to yours
   Michele

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