sending multiple emails

i have successfully set up sending email via postfix using md5 with
ruby.
everything works like ruby magic.

now i need to send emails to multiple people.

do i have to create a loop and send email in that form or is there
another way to do this.
any docs you have come across will be helpful. not much on the net.

tia

I looped it. Maybe there's a better way, but it spit out one email at
a time like a charm.

-Kyle