relayhost and sending some mail directly?

[Dasza Seyda]

If I add a "relayhost" to main.cf:

relayhost = relayhost.example.com
all main will be delivered through relayhost.example.com.



Now, I would like to deliver mail i.e. for @mylocaldomain directly, not 
through relayhost - how should I do it?

I tried sender_dependent_relayhost_maps, but I'm not sure what syntax I 
should use if I would like to deliver mail directly for some senders.