I'm preparing to do a GoDaddy transfer of a client's domain currently hosted on HostGator to my GoDaddy account. The HostGator account holder is a different web designer transferring the domain to me for a client, who happens to be a medical clinic, and have multiple emails registered with the domain, meaning they can't afford any downtime. What is the best way to ensure their emails stay online during the transfer? Also if a transfer can take up to 7 days, does that mean their emails go offline while its transferring? Thanks!