Debian Sarge, ISPConfig, perfect setup followed, email can't login!

[Zoon]

Heya,

I followed the perfect setup for Sarge. I used to use FC4 but I got annoyed with it and decided to go to Debian Sarge. Big mistake so far.

I decided to go with Courier and enable Maildir. It didn't work. I removed Courier and went back over the directions and set it back to default. Or so I thought.

I now get the following error when trying to authenticate the email accounts which its probably worth mentioning I made before removing Courier and disabling Maildir and starting over.

"Plaintext authentication is not supported for this account."

Any help would be greatly appreciated...