Mass E-mail (News to all members)

[Hummie]

When mass e-mailing everyone in my forum, I have to do it over and over separating batches by user ID so that the e-mails are sent in small batches to insure the that server does not time out and that everyone gets the e-mail.

Is there some sort of add-on that can do this for me so I don't have to do it manually? I'm growing weary of waiting a period of time and then manually sending out the next batch.

Also, I never get any bounced e-mail notifications. I read that others get them. Why don't I?
If I could move everyone with a bad e-mail address to another usergroup I could avoid trying to send to them. I'm sure that's unnecessary use of server.