Our company recently changed ISP and since then the blackberry users have lost their connection to the corporate email. The public IP that the BB server is mapped to is different. Users of iphone and android smartphones are able to get their email in their mobile devices without a problem. We already opened TCP 3101 and TCP 443 to outbound initiated bidirectional communication to our BES server from specific IP addresses as described on Blackberry kb34193 and kb03735. Nothing have changed in the server itself. All BB services in the server are up and running. Any ideas?