The "SendMail" function allows mail-sending to a single pre-defined recipient.
How can I send a certain message to several email addresses?
i agree with zzuegg, use the most easy solution - forward the e-mails with your mail-account
like the story of use pencil in space instead spending millions to invent a pen to be used in space
Altough this is not a very new post the problem might be still for some people. A possible solution would be
to use this external library (open source):
It allows attachments, SSL/TLS connections, multiple recipients at once (to,cc, bcc) and HTML body.