if not using one of those excellent MIME::* modules you could do something like the following to set a correct content-type for your mail:

my $mailfrom = 'someone@somewhere.com';
my $mailcommand = "/usr/lib/sendmail -f\"$mailfrom\" -O\"NoRecipientAc
+tion=add-to\" -t ";

my $to = '...' # recipient goes here

open MAIL, "| $mailcommand $to" or die "$0: Cannot execute command: $!
+\n";

print MAIL <<EOT;
To: $to
MIME-Version: 1.0
Content-Type: text/html
Content-Transfer-Encoding: 8Bit
Subject: Some subject here

... your text ...

EOT
close MAIL;
[download]

The relevant thing is that "Content-Type" line, give it a try...

alex pleiner <alex@zeitform.de>
zeitform Internet Dienste