Alternate SMTP Port Numbers
Real-time Black Lists
Mailbox Size Limit
Catch All Mail Box
The Access Field
spammer@yahoo.com REJECT
spamUnlimited.com REJECT
brendan@ REJECT
The Aliases Field
nightrunner: haihwee,beekhim,brendan@sky.com
postmaster: bernard
root: bernard
MAILER-DAEMON: bernard
mailist: :include:/full/path/name/to/mailinglist.txt
baduser: /dev/null
The Custom Postfix Settings field
Note that you can also add an entry for sales for the primary domain (i.e., sales@cutedgesystems.com, above) and point it to another mailbox (i.e. user account) on the server.
This is how you manage the sales@domainB.com account using Mail.app :