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:
One of the toughest deliverability problems to deal with is when mail is blocked or going to spam because the filters are working as intended. Often the underlying issue is a lack of permission.
Read MoreHave you heard about the Baader-Meinhoff effect?
The Baader-Meinhof effect, also known as frequency illusion, is the illusion in which a word, a name, or other thing that has recently come to one’s attention suddenly seems to appear with improbable frequency shortly afterwards (not to be confused with the recency illusion or selection bias). Baader–Meinhof effect at Wikipedia
There has to be an corollary for email. For instance, over the last week or so I’ve gotten an influx of questions about how to fix delivery for one to one email. Some have been from clients “Oh, while we’re at it… this happened.” Others have been from groups I’m associated with “I sent this message and it ended up in spam.”
As 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.
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