What is the best mailing list script?

[EN1GMA]

Hi friends,

What is for you, the best mailing list script to send newsletters to your subscribers?
I always used phplist, but is a little bit confuse and needs many maintenance...

Is there any script better?

I have a database of 500.000 emails and want to import from phplist to the new one.

thank you

[RyanEagle]

I'd be interested too - looking for something that can take adult mailings.