[Mailman-Users] billing for mailing lists

[Albert Everett]

Anyone have any magic formulas for how to bill for mailing lists so 
that it's fair for the client and covers hardware and bandwidth costs?

Is the file that has the list membership countable by line? I could 
see a monthly script that counts the membership file and bills per 
member. That wouldn't consider how busy a list might be, though.

Albert