Group emailing & spam bounces

[dweiss]

For years I've been sending out group emails about gig announcements, always using the bcc field out of respect for the recipients. This is not spam. Everyone who gets the email signed up for it. Lately, I'm getting hundreds of returns because servers like AOL and others are interpretting my mail as spam. The only way around this problem seems to be using a mail program that automates the addressing of individual emails as opposed to the whole group at once.

What program does this? I get enough spam to know it's possible. I'd prefer it to be a Mac program but I do have Virtual PC as well, so I could run a PC mailer.

Thanks.