It sounds like it's entirely up to the email client on how it parses for links ... will it work to send a HTML link? 
my $s = "\\\\server\\weekly reports\\report.txt";
my $url = $s;
$url =~ s#\\#/#g;
$url = 'file:/' . $url;
$smtp->datasend( sprintf('<a href="%s">%s</a>', $url, $s) );

[download]
Update: added the proper file:/// syntax

In reply to Re: Cannot get Net::SMTP to print file path with spaces properly by davidrw
in thread Cannot get Net::SMTP to print file path with spaces properly by yankeeblue

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