Thank you for your post.
There are certain script steps not available from the server. If you edit your script, you will notice in the bottom left corner a pop-up next to "Show Compatibility". Select "Server", and you will see the script steps available to you. If you are using FileMaker Pro 10, the Send Mail is available, but not through the Email client; only through SMTP server. Since your error message states "unsupported script step", I am assuming you have the Send Mail script step set for Email client. If you are using FileMaker Pro 9 or earlier, the Send Mail script step is not available for Server.
Thank you for the response.
I am using FileMaker Pro 9. There is no "Show Compatibly" but I do see "Indicate web compatibly" and see how this option displays which scripts are available for the web, thank you, this is nice to know.
Also, I am sending email through SMTP but I will assume the limitation is because of the version of FileMaker Pro 9 I am using. I guess I will have to wait until we upgrade to FileMaker Pro 10.
Thank you for your time and consideration.