My ISP blocks port 25 inbound and outbound, so i am using a smarthost in order to send out my emails from exchange. I can no longer emails via OWA or using activesync on my phone. I can send emails from the outlook client and that is all. any ideas on what i need to do in order to use OWA and activesync for sending emails again. Before port 25 was blocks all these feature worked correctly and I didn't use a smart host.