Yes it is possible, and what you are doing looks fine, except that

1. your path name is in single quotes and so is being understood as a literal
2. you're specifying a multipart message type when actually you want a single part which should be text
3. and you could combine two steps into one:

$msg = MIME::Lite->new(
             From => 'Netbackup@companyname.net',
             To => "$Email_List",
             Subject => "${hostname} Available Tape Report",
             Type => 'TEXT', # or 'text/plain','text/html' etc
             Path => $OutFile,
             ReadNow => 1);
[download]

But you haven't said what does or doesn't work. What is the problem?

clint