We have a website that we want to change to a new host. However we're a business and we don't want to lose potential clients because of our email addresses being inaccessible. Our email addresses are firstname.lastname@example.org so we need them up and running.
I am unsure of the following questions:
1. Once we change the nameservers of our domain to transfer hosts, how long will it take to get our domain to transfer to the new host?
2. Will our email addresses by down for the same period of time?
3. To get our old emails, do we need to manually save them from the old server?
4. Do I have any options to make sure we do not lose any business emails during the delay in changing nameservers?
Thanks in advance,