I'm loooking for a massive mailer app.
I've try some by now,the thing is I want an app that it doesn't need smtp,
so the app is able to use Apple Mail email account to send mail.

I tried Mac Mass Mailer, but it doesn't allow you to choose which email account you wanna use. aparently it uses the default account, but I don't know how to set a default account in apple Mail

Any help is appreciated