Mod to include Guests when sending newsletter in smf 2.0.1

[neyola]

I need a mod to include Guests when sending newsletter in smf 2.0.1.

I mean guests that have made post as Guests, is it possible to include them when sending newsletter?
I am using default theme smf 2.0.1

The guest's  emails are not in my database but on my website since they have posted as a guest already. I can view their emails one by one and send personal messages but am looking to send them group messages as well