I am having an issue with the Exchange SMTP connector for rogerswirelessdata.com not delivering mail to a client's windows pc phone.The messages are stuck in the server queue and a restart of the SMTP service and the entire server have not resolved the problem. I have verified with Rogers Wireless that I am using the correct information for their server. The perplexing part is that during the initial setup and test, messages were routed correctly and delivered. The failure began to occur about 36 hours after the initial setup was complete. Any ideas on what is causing this issue?