sending large number of e-mails

[J Patrick Draine]

Dear List,
Can anyone help me out with this situation? I want to send a message to 
a large number of folks, members of an organization. What mail program 
would be appropriate for sending something out to approximately 2000  
addresses? Obviously I'd want to it to go out as a "blind copy" as 
recipients would get distressed if the address is many pages longer 
than the message.
I could use a PC if there's no easy Mac way of doing this.
Thanks,
Patrick Draine