sending ozmac via mail

[Dark Servant]

I'm trying to configure my Mail program to use my ozmac.com email.  
I've got everything figured out except for the outgoing server part.  
Could someone tell me what I need to put in this part?
Also over time I've got a bit over a build up of outgoing servers for 
selection.  Is there a way to delete the unused ones?

Thanks
Ruben A. Franke