Resolved Mass Mailings in SeaMonkey (or T-bird)

If I want to send out a mass mailing to a 'group', how do I do this so that they are included in the BCC (blind copy)? When I do it as individuals, I simply put myself in the "To" mailing and BCC the individuals. But I'd like to BCC a group. Furthermore, I'd like to be able to pick and choose members of that group. I can do this beautifully in Gmail. I have groups there according to Family, Friends, Work and anything else I choose. When I BCC a certain group (i.e. Friends), my Friends group pops up and I can select ALL of just check off the ones within the group that I want to receive the mail.

Can this be done in SeaMonkey or T-bird?

 

Brilliant. Thanks, Tony.