Separate ConnectionStrings and mailSettings from web.config? Possible?

Question

Is it possible to separate ConnectionStrings and mailSettings from web.config?

Devel environment has different IP addresses for connectionstrings and smtp mails because

Answer 1

I found the answer on MSDN:

<configuration>
    <connectionStrings configSource="connections.config"/> 
</configuration>

With file connections.config containing

<connectionStrings>
   <add name="name" connectionString="conn_string" providerName="System.Data.SqlClient" />
   <add name="name2" connectionString="conn_string2" providerName="System.Data.SqlClient" />
</connectionStrings>