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Spam Increase in June 2009


By steve - Posted on 18 June 2009

Spam Hit!

Anybody else notice a huge increase in spam between June 1 and June 18, 2009?

I have one location that normally processes between 24,000 and 30,000 emails a day, with about 500 to 800 being legit. The messages processed at that location have increased about 10,000 per day until the 16th when it reached about 80,000 messages per day (still having 500 to 800 being legit).

It got to the point where I had to contact Barracuda Networks tech support so they could change some configuration settings and help me adjust the MTA's settings to cut down the number of messages scanned, just so that the inbound message queue didn't get bottled up and swell past 15,000 messages. Since the changes, the barracuda interface itself is much more responsive.

I won't go into all the settings that were adjusted, but I will say that the techs I worked with were very helpful and we are now "weathering the storm" in much better shape than we were before.

We were getting creamed from IP addresses from jp, nz, au, br, cn, etc. We were also getting a ton of messages with bad user IDs. Emails with viruses normally run about 2% of messages, but we started getting a much higher percent with viruses, along with the massive volume increase.

Click on the little chart to see it full size.

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