Ask HN: How do your organize email communication/client support?

Currently when we receive an email, we reply an BCC: each other but it's not convenient.

What is the most efficient way? mailing-lists? or some third-party like zendesk? We are just starting on not getting tons of emails.

The goals to achieve are: - Client support email that everyone (3 people) in the company receives. When one of us replies, everyone should know that the message has been replied to avoid wasting time. - Internal communication: be able to filter organization vs. development stuff

Do some of you use something like Google Groups? Or do you have a support@ mailing list and dev@ / general@ mailing lists? How do you make all this as efficient as possible?