We currently have about 60 vendors we would like to email to send out letters with a word document or PDF attachments that we could email monthly or bi-weekly depending on the situation. We are running MS Exchange 03, but Exchange does not have a listserv management feature. I'm looking for advice on setting up a third party listserv to accomplish this. This is not SPAM, however I'm worried if we send this bulk email through the Exchange Server our Exchange Server's IP could get black listed. My thoughts are setting up a dedicated box to run the listserv. I've looked at applications such as hMailserver, listservfree, or sympa.org. I'm still unclear what application to use. Any suggestions? I'm also confused about how to properly set this up in regards to the DNS settings. My thoughts were to add an A record on my domain such as listserv.domain.com that points to an external IP that my firewall redirects to the private IP of my listserv box. I could then have my ISP setup a reverse DNS entry for listserv.domain.com on the external IP address I point it to. Can anyone provide any feedback on this topic?