those using gmail accounts.
We checked, and the data center support team swears that neither the IP or any of our "neighbors" are on any blacklists.
As far as we know, its only happening with gmail. We are not receiving any error reports or bounce backs.
We did add to the dns a "google-site-verification" TXT item and well as a "v=spf1" TXT item to our DNS.
Still nothing! Any help from the GFY community would be appreciated.