iis 7 - IIS 7 smtp cant send email -


my application needs send out emails users, somehow can't make work. have installed smtp server , in iis have set smtp use localhost, port 25 without authentication. when try send email, allways getting error 

no connection made because target machine actively refused 127.0.0.1:25

when choose option store email in directory, works fine, problem isn't in app. why happen? thing thinking about, if need have port 25 opened or not?

this happen if don't have smtp server listening on port 25.


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