Wanted: complex "mutt -s ..." example

[Paul Gilmartin]

Is there an example somewhere of using "mutt -s" to send a message
with multiple attachments, each having different Content-type,
Charset, Content-transfer-encoding, and Content-disposition?

Or even separate messages, controlling all those attributes from
the command line?

Is it even possible?  I know I've done it from the menus, but I'd
rather be able to script it.

Thanks,
gil