$mailer = new Mail::Mailer [type, command]
Constructor. Creates a new Mailer object representing the message to be
sent. If the optional arguments are specified, the value of
command depends on type, which can be one of:
mailUse the Unix mail program. command is
the path to mail. The module searches for mailx, Mail,
and mail, in that order.
sendmailUse the sendmail program. command is the path to
sendmail.
testUsed for debugging. Calls /bin/echo to display the data, but
doesn't actually send any mail. command is ignored, if specified.
If no arguments are specified, the Mailer object searches for executables
in the above order and uses the first one found as the default mailer.