No responses on how to disable that message? Okay, here's another possible solution for the future that isn't exactly what you're requesting: SendBlaster.com. I use an older version from time to time, and it works well. In the version I have, I think you need to know HTML pretty well to make very attractive, high graphic emails with this software, but they may have upgraded this in the newer versions. It allows for insertion of custom data fields (like Word), it merges directly from your Excel or CSV files, and it sends emails directly through your internet connection. So it won't throw that warning message every time. You can download a trial version for free that lets you test it by sending 10 emails at a time.

Thanks BM. I'll have a look at that.
Your suggestion has prompted me to wonder if Open Office has a mailmerge email option that might do the job. I have Open Office already installed, so that would be convenient - and cheap.

Has anyone discovered a solution to this problem? I am having the same issue.