[exim] Router and Transport

Hello



I need to create router and transport for various ISP



Example



Router must check if email arrived is for @yahoo.com, if yes must use
transport smtp_yahoo



Transport smtp_yahoo must have custom rules, for example must sent MAX 5
messagges for single SMTP connection.. and other rules



How create this and what is the rules that I can set on transport ? As the
same of SMTP ?



I have check and read documentation about this but I'm newbie about this :)



Thank x any help / suggest