How do you get around the too many recipients notice; not spam?

[Frustrated Outlook User]

I am not spamming anyone. I'm sending out an invitation. Why am I getting
the "Too many recipients" error message, and how do I get around this.

 

[Vince Averello [MVP-Outlook]]

It's probably coming from your ISP's mail server. You need to split the list
up or use a mail merge tool:
http://www.slipstick.com/addins/mail.htm#massmail