Needing some good mail software

I need software that will allow me to send mail to large
groups of people. I would like to send mail to :

someid@someplace.com and have it send it to a group a people
specified for that id. I also do not want anyone but who I
designate be able to send to this userid.

I need this to send mass mailings out to my customers (I work at an ISP) using a single email id.

What is the best (and cheapest) software out their?

Thanks Chuck,
sorry about only giving 40 pts, all I have left.
bigchuckAsked:
Who is Participating?

[Product update] Infrastructure Analysis Tool is now available with Business Accounts.Learn More

x
I wear a lot of hats...

"The solutions and answers provided on Experts Exchange have been extremely helpful to me over the last few years. I wear a lot of hats - Developer, Database Administrator, Help Desk, etc., so I know a lot of things but not a lot about one thing. Experts Exchange gives me answers from people who do know a lot about one thing, in a easy to use platform." -Todd S.

ahoffmannCommented:
sendmail as MTA, and any MUA speaking SMTP you like.

Nothing could be cheaper, its part of any UNIX :-)
0

Experts Exchange Solution brought to you by

Your issues matter to us.

Facing a tech roadblock? Get the help and guidance you need from experienced professionals who care. Ask your question anytime, anywhere, with no hassle.

Start your 7-day free trial
It's more than this solution.Get answers and train to solve all your tech problems - anytime, anywhere.Try it for free Edge Out The Competitionfor your dream job with proven skills and certifications.Get started today Stand Outas the employee with proven skills.Start learning today for free Move Your Career Forwardwith certification training in the latest technologies.Start your trial today
Networking

From novice to tech pro — start learning today.