I have an indicator on the account record which allows viewing accounts within a certain group. There are2000 companies.

One group has 60 members, I want to email the managing directors at these accounts. The group indicator is at the account level not the contact level I cannot see a way of filtering the accounts and then having access to the contacts

Could someone let me know what I have to do? 

Is the routine for this somewhere I cannot be the only user that wants to do this type of function.