If you're considering a Dreamhost account, beware that their email system is abominable. They have a spam killer called SpamAssassin, which, when operated according to their difficult instructions, still lets through dozens of spam messages per day.
Also, their webmail client is primitive and contains no methods for blacklisting spam messages from your inbox. You have to do it manually.
On other threads, Dreamhost has had a shill respond that it is not their duty to provide email for the domains they host, that that is just gravy for the customer. Well, they provide it, and it is god-awful.
Dreamhost will want you to use Gmail. They practically push you to do it. And again, beware - they will tell you that it is a one-click install. Well, it's one-click for Dreamhost to get rid of your email account, but you better have a deep understanding of how to manage all sorts of profound web stuff if you ever want to see your email actually show up at Gmail. Gmail warns you that the setup takes about half an hour - and that's if you really understand technical stuff. I've been using computers since the git-go, and have not been able to make the transfer, so you better be pretty damn good at advanced web management.
And Dreamhost will do nothing to assist you in this. Their online documentation is the worst in the industry, written exclusively for geeks whose lives are based around tweaking their computers. If you're just a user who wants a streamlined experience, avoid Dreamhost.
Dreamhost is okay for domain hosting - pretty good, anyway, they had all sorts of security issues resulting in the compromising of accounts and the loss of WebFTP for weeks - but if you need your service to include email, do not sign up with Dreamhost, because it couldn't possibly be worse. You will get spammed to the maximum, and they don't give a damn.
By the way, Dreamhost's main feature is providing customer service that is very good at appearing to be cool, hip and caring, but there is no correlation between what customer service says and what their managers actually implement.