To reduce questions about signing on and off, etc. to Tweeters it might be a
good idea to do post some instructions like the Wildlife Ecology Digest (WED)
does. The WED is posted once each week. At the beginning of each digest
they include the following:

""Mail to the WE Digest should be sent to kingfshr at northcoast.com
with the following instructions:

To post messages: Type "Post to WED" and include your post.
To subscribe: Type "Subscribe WED".
To unsubscribe: Type "Unsubscribe WED".
To ask questions and/or give comments to moderator: Type "Q&C" and
include your questions and/or comments.
To receive a current index to topics in back issues: Type "Send WED Index".
To receive back issues: Type "Send WED #n" and include issue #(s) you want.""

Hugh Jennings