[Mailman-Users] Email Subscription

[Jon Carnes]

> And does the sysadmin have to have set up a username
> listname-request
> for this to work?  Otherwise, wouldn't it just get
> rejected with user not found or some such?
>
No.

If your MTA is sendmail or sendmail compatable then it checks first in 
/etc/aliases for any aliases (or address translations):
  mailman:  jonc
  abuse:  jonc
  ithelp:  jonc, jaimiel, lward
  
In the above example abuse, ithelp, and mailman are not users on the 
system, but jonc, jaimiel, and lward are users on the system.