You might be interested to know that Mimecast tech support has confirmed that the IP geo database they are using is, in fact, identifying the IP itself for groups.io's email server (NOT the TLD) as originating in Hong Kong.? So some IP geo databases identify it as originating in US, and some identify it as Hong Kong. The filtering method itself is not "bogus", nor "absurd".? It is simply using a flawed database. This could easily affect any type of spam filtering engine, including those used by public email providers, not just corporate email systems, if they are using that database (or any other IP geo data feed that also uses that data source (i've identified at least 2 more).
Just trying to give other moderators a "heads up" that this can cause email blocking for their groups.
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Bryan
