I think the point is, that sending the same news letter to 3000 recipients in one hit will likely be regarded as spam. Remember that the Anti-Spam laws in your country are different to those in the US. It's the US laws that count because you are using a US based service.

In any case Availor, you can setup your Gmail account as POP, and use a regular email client (I use Foxmail and Opera M2).
Sending out the same newsletter to everyone in your address book then becomes quite easy.