Hi rio, give the hyperlink using HTML tags in the message part and mention the type as "text/html". See as below:

my $message_body = "This is a list of things to bring\n<a href=\"http:
+//www.perlmonks.com\">Fresh flowers from Flowershop X</a>\n<a href=\"
+http://www.perl.org\">Today's Arragement instructions from instrucito
+n home page</a>\n";

### Add the text message part
$msg->attach (Type => 'text/html',             
           Data => $message_body        
          ) or die "Error adding the text message part: $!\n";
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