Hi Steven,

sorry for not getting back to you earlier.

In general, I would like to encourage you to get in touch with customer support if you are experiencing issues with your Senderbase score. I just checked your current repoutation and the score is back to neutral at this time. Since the score has already changed again, I unfortuntaley cannot 100% confirm if your decreased score was in fact related to the issue referenced by Peter. That said, given the timing and your location, it is in fact likely.

Now, to provide a statement regarding the issues referenced in the IT News article.

The war against spam requires a daily battle with spammers and purveyors of malicious content. Cisco maintains the world’s most trusted and effective mail security technology through constant research and development, accompanied by constant measurement of results.
 
Tuesday morning PDT, Cisco became aware of an issue that resulted in Cisco email security products blocking some legitimate email senders. This was the result of recent algorithm updates that focused on newly identified Internet traffic behaviors indicating spam activity. Unfortunately, this traffic behavior is also seen in some legitimate email activity, resulting in the inaccurate blocks.
 
Upon learning of the issue, Cisco immediately implemented algorithm changes, fully resolving the issues by Tuesday evening PDT. Cisco security specialists are continuing to closely monitor the situation, to ensure no further impact to service.  Cisco is also enhancing monitoring procedures to more quickly identify any negative impacts of new rules in the future.

Best,

Sebastian