You need to place the line 

attachments = yes

within the list configuration header itself.  It's not a command that you would send to the server.

>>> [log in to unmask] 08/17/01 04:05PM >>>
Hello again,

I am trying to allow attachments to a list and going off of the manual, I
type
Attachments = allow listname
This comes back with this message:

> attachments=allow propond
Unknown command - "ATTACHMENTS=ALLOW". Try HELP.

Any suggestions?