Run/ edit/ delete the Edit Email Settings script in C:\Program Files\Adobe\Adobe After Effects CS4\Support Files\Scripts\(support).
that looks like it's for the PC. I'm using a mac. when i tried deleting the script it wouldn't let me.
For Mac, the path is of course slightly different. If you cannot delete the file, you should at least be able to edit it in Extend Script Toolkit or any text editor or run the script separately to change its config data. Works for me...