Need Advice on Email problem

[goldnuggetsales.com]

I sent out a newsletter today from my ZenCart admin under: Tools, Newsletter and Product Notifications Manager. It sent less than 1/2 of the emails on my list and I got an error message.

This is the error message I got:
Email Error: Could not instantiate mail function. Please check Admin->Configuration->Email Options->Email Transport.

When I go there I have a choice of settings to choose:

PHP
sendmail
sendmail-f
smtp
smtpauth
Qmail

It is currently set at PHP. Should I use a different setting than PHP? Or do I need to change some other setting to make it work?

Thanks for any help you can give me.

Garry

[dbltoe]

http://www.zen-cart.com/wiki/index.p...Email_Problems
http://www.zen-cart.com/wiki/index.p...Of_Lost_Emails