Your header is wrong, it should look something like 
print header( -type => $format,  # no filename here
              -content_disposition => "attachment; filename=$file2");

[download]

From RFC 2183 (emphasis mine):

2.1 The Inline Disposition Type

A bodypart should be marked `inline' if it is intended to be displayed automatically upon display of the message. Inline bodyparts should be presented in the order in which they occur, subject to the normal semantics of multipart messages.

2.2 The Attachment Disposition Type

Bodyparts can be designated `attachment' to indicate that they are separate from the main body of the mail message, and that their display should not be automatic, but contingent upon some further action of the user. The MUA might instead present the user of a bitmap terminal with an iconic representation of the attachments, or, on character terminals, with a list of attachments from which the user could select for viewing or storage.

"What should it profit a man, if he should win a flame war, yet lose his cool?"

In reply to Re: Safari downloading files by Joost
in thread Safari downloading files by scoobyrico

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