Exim using relay host

[Christian Schoenebeck <christian.schoenebeck@epost.de>]

Hi!

I want Exim to send emails for some specific users over my ISP's SMTP server 
instead of sending them directly. I added following router at the top of the 
routers setup to check the senders address and if it matches one of the 
'senders' list, it should send their mail via SMTP over my.isp.com:

myisp_smarthost:
  driver = lookuphost
  transport = remote_smtp
  senders = john@someisp.com;bob@someisp.com
  fallback_hosts = my.isp.com

But that didn't work. It's still sending their mails directly to their 
destinations instead of using my.isp.com. What's wrong?

Thanks in advance!

Christian Schoenebeck