Can AIX/UNIX send mail with html message AND an attachment?

Is there an easy way to send a formatted html message AND an html
attachment from AIX/UNIX? We need to send our users reports that are
quite wide, and when it goes to Notes the columns are wrapped and it
doesn't look pretty.

What the users want is an email with an abbreviated report of a few
fields, and then an html attachment that displays the entire report.
They want the email in html so it has the bold/highlighted text, table
format, etc.

The mail command doesn't send html message, but you can send an html
attachment with uuencode.

The sendmail command will send the html message, but will not allow
attachments (at least I can't figure out how).

Any ideas?

Mark