If I point the name server to HH and then point the MX records back to Network Solutions will there be a down time on the email? The company pushes probably atleast 2000 emails a day so I'd have to make sure I did it in the middle of the night if a 2 hour downtime is the case.
Thanks!
(EDIT: I'll just contact support, but I feel like the down time question could be good for reference!)