Bulk email invite to Facebook group

I wasnt quite sure where to post this, so if this is in the wrong category, sorry!

Anyway, I just started a Facebook group on a niche that is currently very popular.

I have (legally) obtained about ~50.000 e-mail addresses by running Facebook apps, and was wondering if its possible to bulk invite them through the email invite function within the group.

Does anyone have experience with this? Are there any alternative options?

yes i hav same problem here

Yes, let me know also if there is a working solution for this ?

Maybe someone can program an IMacro for it ?

Yes there are a few working solutions for this right now.

Bumping an old thread, but is there still a working solution to this?

I am looking at thos solution, any one had alternative.

I found one chrome extension, yet is a paid one :-(

https://chrome.google.com/webstore/detail/group-invite-by-email
if you guys had budget, can try it