Email outside of Rails

I'm working on an application that requires a process to send/receive
SMS messages (via email for now) outside of Rails. Right now I have
it working using the ActionMailer and ActiveRecord objects in my Rails
application.

Is it better (quicker, more scalable) to read/write to the database
and send/receive outside of the ActiveRecord and ActionMailer models I
have setup in rails?

Mark wrote:

I'm working on an application that requires a process to send/receive
SMS messages (via email for now) outside of Rails. Right now I have
it working using the ActionMailer and ActiveRecord objects in my Rails
application.

Is it better (quicker, more scalable) to read/write to the database
and send/receive outside of the ActiveRecord and ActionMailer models I
have setup in rails?

Yes, you can make more scalable solutions outside of Rails. But...

Is the current solution not working?
Are you having performance issues?

If not, why bother?