I have a newsletter list of 2287 people but when I send out a newsletter I get this message after one line of checks + 16 checks on the second line:

Email Error: Could not instantiate mail function.

I know some of the emails are going out but am unsure if all of them are going out.

Also, any ideas on what is causing the email error?

Thank you!

Shrimp-Gumbo-mmmhhh