Forever I've just let the mailbox name for Sendmail automagically be the
same as the uid.  Is there some "simple" way to change the portion before
"@" of an e-mail address so that it is different from the uid, and that
Sendmail will refuse to receive e-mail addressed to the uid (return "No
such user"), and only accept mail for that user addressed to the specified
"e-mail name."  TIA

-- 
henry nelson
  WWW_HOME=http://yuba(dot)ne(dot)jp/(tilde)home/