When it comes to deciding who should be allowed to send emails on behalf of a company, businesses can benefit from collaboration between multiple teams. The key factors that impact email responsibilities include company size and growth, send frequency, team structure, and workload. To effectively share email responsibilities, companies can create templates and style guides, set up a place for collaboration, implement content bumpers to maintain messaging consistency, and establish an "in case of emergency" plan to handle mistakes. By implementing these strategies, businesses can ensure that their marketing efforts are efficient, effective, and customer-centric.