Is this a scam?

I have received several email of a nigerian company call Molofils Industries, located @ #166 Jubilee Road, Aba Abia state, Nigeria.
They want a large container order of wine. I have been sceptical in providing information but I eventually sent a Proforma Invoice.
I still feel they are not legit. How can I get confirmation.

Thanks from Portugal.
Maria

Best thing to do right now is post up the actual details of the emails you've received here. The more information we have the better we can help.

not sure how to do that? Shall I attach an actual email?

You can copy and paste the content of the emails, making sure to delete any of your information from them.