The Barracuda twitter account has been very helpful and responsive to the issue. A few hours ago they tweeted that the problem should have been fixed.
Reports are that listings are resolving and things are getting back to normal. Folks are getting responses to emails to the address provided by Barracuda.
250OK confirms that they’ve seen more than 50% of the Barracuda listings drop off:
Many questions about delivery problems often assume that there is one standard email filter and the rules are the same across all of them. Unfortunately, this isn’t really the case.
Read MoreAs the volume and severity of malicious email increases, filters are increasingly following links in emails. This is really nothing new. Barracuda and other filters have been inspecting links automatically for years. From what I’ve seen there does seem to be some level of risk analysis based on domain reputation. That makes sense, not only is following links computationally expensive, it can also delay mail receipt.
Read MoreA number of folks are talking about a significant uptick in Barracuda IP blocks over the last few days. These blocks appear to be affecting wide ranges of IPs across multiple networks.
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