We have a situation where some email isn't reaching its
destination. The Internet records on the receiving company
site an MX record for their mail server, plus several MX
records that appear to be associated with Postini filtering

Since it's important to our operations that our email reach
its destination (and short of the receiving end's actually
figuring out how to WhiteList), I'm wondering if we can
add a HOSTS file entry to our GWIA server, Reload the
HOSTS file via "WS2_32 RELOAD HOSTS" and send
directly to the non-filtered server?

Does GWIA read the information in the HOSTS file?
(We're sending our email directly out, not forwarding to
an outside server.)