Hello. I came in to my position several years ago to discover that we had about twenty domains hosted on three different providers and registered across 3-4 different registrars. In the intervening years, I have consolidated every active domain and registration to a single host/registrar - Dreamhost - with one notable exception - our primary corporate domain (main website, e-mail, etc.) It is HOSTED on Dreamhost with everything else, but the registration has remained with a separate company. The only thing on that account is this registration, with it's nameservers pointed to Dreamhost.
It's time to update our website and, in this process, I would like to go ahead and finish this consolidation proces and get our primary domain transferred to Dreamhost. My question is, should I expect any sort of downtime - particularly with e-mail! - transferring this domain? As I said, it is already HOSTED at Dreamhost, so the DNS records there are already set, etc... it's just the domain registration I need to get moved over.
Would appreciate any insight into this matter. I really can't afford much if any e-mail downtime, but obviously I'll have to do this over a weekend if possible, regardless.
