Each alias may redirect mail to several recipients, and each recipient
may be one of the following :
- Email Address
- Either a full email address like foo@bar.com, or the name of
another user on your system like jcameron.
- Addresses in File
- For this kind of alias you must specify the full path to a file
containing a list of email addresses, one per line. Each address can
be either fully qualified, or the name of another user on your system.
- Write to File
- In this case, email will be written to the specified file. To have all
email to some address thrown away, give /dev/null as the filename.
- Feed to Program
- Each time an email message arrives for this alias, the specified program
will be executed and the entire email message (headers and body) passed
to it on the standard input.