We are having trouble sending out a bulk emailing. We have 1600+ contacts to send to and I am wondering if there is a limit on how many emails you can send at once?

I know that an incorrect email address can throw a wrench, but I am sure I have cleared all the bad addresses out. Any suggestions?

Janice-I have ran into this issue as well. I would suggest that you first check with your ISP provider. They may have a limit on how many e-mails you can send over a certain time period. In my case the base backage that I had from the ISP was "250 SMTP relays/day". This limited me to 250 e-mails. Your ISP will allow you to bump up this limit-for a price!