Spam Again

I’m currently working on Spam filtering… again.

We’ve been using Katharion for filtering. It has worked well enough that I was able to turn off filtering locally. For the past few weeks however; we’ve had an influx of spam getting trough. The body contains information as if from Microsoft. In reality; it’s pharmaceutical adds of drugs of which, according to my wife, I don’t need.

I enabled the IMF filter on Exchange last week, in hopes of capturing these items. Well… it didn’t help. I’m glad in a way. I didn’t really want to have to manage IMF again – too many false positives; and too much time sorting through to find them. I’ll contact Katharion and see what they say.

We have also been getting returned mail from mail that we never sent. There’s nothing I can do about outside address books getting compromised. Us IT folks understand that. But I find myself re-explaining it to staff on almost a daily basis.

Spam… I hate it.

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Well... It turns out to have been a simple fix. I had whitelisted our domains; which ensured mail coming from our people from made it through. It was a good idea at the time, but it kept mail falsely appearing to be from one of our domains from being filtered. Which, in turn, let in spam.

I still hate spam.