Watch your quotes. I see you have '$addr' somewhere. The single quotes prevent $addr from being interpreted. You don't need to use quotes at all to use the contents of a variable. You can just say $addr rather than "$addr"; and don't use '$addr' if you want the value of the variable to be used. As far as the filenames instead of the files, well, you may have to read the contents of the files; I don't know about the API of Mail::Sender.