E-mail software

Hi guys,

Here at our work we need to send a newsletter to about 3000 customers. Now we send e-mail with crappy software :d:

I’m looking for a free e-mail software to send much newsletters without limit (we have much email addresses, much lists and send very frequent letters out), so no trial versions.

It needs to be a software and not a webbased service like the very good phplist, my boss wants only software.

Now we have several mail list in excel that are merged into each other, for example:

John[LIST]
[]customer
[
]big spender[/LIST]Jeffry[LIST]
[*]Customer[/LIST]So if we send a e-mail to the “customer” list john & Jeffry needs to receive the emails but if we only send to the “big spender” list only john needs to receive their email.

The most difficult of the program is the unsubscribe , because in most program’s if a person unsubscribe the email address is completely unsubscribed, but if John unsubscribe for the “big spender” list and he still want to be on the “customer” list we have here a problem of course.

If anyone has a suggestion or knows a good program, let me know.