Please help solve the problem with this address

DriveHQ has implemented a very sophisticated spam-filter technology. The new technology has been deployed. In our tests, it can filter/block 80% of spam emails, and tag 18% of remaining spam emails with a subject line of [Spam *...] (i.e. filters 98% of spam emails!)

Very rarely, it blocks valid emails. In this case, please email us the email header, or forward the email as an attachment to us.

If you cannot receive emails from a particular testing domain, yes, this is normal as the new spam filter blocks emails from many un-trusted home PCs using DSL/CableModem.