I have been using Outlook 2007 (Office Enterprise 2007) with Windows 7 with no problem for many months. All of a sudden, I cannot send or receive emails and get error code 0x899700c1. I use Earthlink through Comcast and have been through troubleshooting with them and all of their system/settings are correct. I have deleted my account and then added it back with no resolution and cannot find any help information online that has suggestions that are relevant to this problem. Does anyone know how to correct this?