[exim] Multiple smtp relay

Hi all,
I'm coming from sendmail and I would like to move to exim but I need some
advices.
I have an application which on request can send out some emails. I
configured a mail server (sendmail) on the same host which relay all to a
smtp server which is allowed to send email to the external world (DS macro
in sendmail). I would like to have configured more than one smtp relay so
the relaying traffic could be balanced among different smtp servers and in
case of one smtp server down the mails could be ever relayed. Would it
possible this kind of configuration using exim?

Thank You