InfoPath Dev

Not in the form you sent me. https://server/sites/_vti_bin/FormsServices.asmx is what is in the design checker. Given your publish location, I'd expect https://server/sites/apps/bbu/eco-dev/_vti_bin/FormsServices.asmx

Well - no promises, but I just did a quick test, and I think you should take a backup copy of the form and save it as source files (from the publish menu). Find manifest.xsf and look for the text xsf2:solutionPropertiesExtension branch="mail" and remove that node - see outlined text in my screenshot. From there, you can save the file, ...

 I am working with a lady who has created a form as type "email form", then at the end of her development she has come to me and said "How do I get this to publish into a SharePoint library and allow people to fill it in using their web browsers?". I've looked all over but can't find any way to switch form type - ...

the site URL which I have given is correct

I think this is just InfoPath Browser forms being stubborn. In the browser, we often see differences in rendering and behavior from preview (which is why it is important to test in the browser). I'd suggest my approach.

Oh man, I've done that too. Glad the forum has been helpful!

I'm attaching a copy of the form with the subpackage dropdown set the way I think it should be, with the ID for that list as the value.

Looking at the URL you are using for the design checker verification, I'd guess that would be your current issue. Click Change settings at the bottom of the design checker and enter the URL to the site you are trying to publish to.

I would think this could be done - as long as the form was set up to include the template with the form in the email, so that you know the user will have access to the template, and assuming all email recipients will have InfoPath installed.

 Any chance I could see a copy of your form so I could take a look at the rules? You can attach a template under the Options tab in a reply. I'm guessing that you need to have custom validation on your second set of radio buttons so that they are only "cannot be blank" if the first set is equal to Yes (0).