[ale] Another sendmail question

[dmcnash at charter.net (Doug McNash)]

I know how to map my public address, dmcnash at xxx.net, to 
my local address, doug at localhost, using the virtusertable 
when receiving mail.

How do I map doug at localhost (actually doug at xxx.net since I 
masquarade the domain) in the headers when I send mail?
  
--
Doug McNash <dmcnash at yahoo.com>