I had 10 cforms2 that worked perfectly, inlcuding a sidebar form (thanks for all the great tips on updating the CSS for sidebar forms!) and yesterday after I installed subscribe-to-comments, subscribe2 and the subscribe2-widget-hack none of the cforms or the subscribe2 forms are sending e-mail.

Any idea where things went wrong?

Are there any known conflicts, or best practices for using multiple plug-ins like this?

I am told I have PHPMail 5 on the host I am using under Windows/IIS.

Thanks!

Jeff

Looks like the problem was with the FROM: E-mail Address setting.  Originally I had set this to the admin id in form "xx@yy.zz".  Yesterday I was cleaning up things and I took the default as stated in the settings page.  This caused the problem as the "abc <xx@yy.zz>" default setting was inserted.

As advised "The default FROM: address is based on your blog's name and the WP default address. It can be changed, but I highly recommend you do not, as it may render the plugin useless. If you do change the FROM: address, triple check if all admin emails are being sent/received!" changing this caused the issue, regardless of the fact that I did not start out with the default. 

In fact it appears that switching between "xx@yy.zz" and "abc <xx@yy.zz>" formats is the bug.  I can put in any "xx@yy.zz" format e-mail since that is how I originally implemented.

Jeff