I'm a bit confused about what has happened with one of my client's email accounts.
My client registered a domain at dotster.com. She wanted to start using email for that domain before we had her website up, so I set her up through Google Apps mail, and added the appropriate MX records to her dotster account.
When her website was ready, I hosted it on dreamhost and pointed to Dreamhost's nameservers for the domain in the dotster account. (e.g. Domain hosted at dotster pointed to Dreamhost nameservers for web hosting). MX records stayed the same as before, and everything worked fine for a while.
Today, she told me her email started bouncing. " error that the other server returned was: 554 554 5.7.1 : Recipient address rejected: Access denied (state 14)". When I did a traceroute, the MX records didn't show, but the text record did (also set at dotster).
So I went over to Dreamhost and added the MX records there. Now her email is working again.
1) Do the MX records have to be set at the place where the nameservers are pointed to? I thought they were independent.
2) I'm also pretty sure her email was working for a good amount of time after I pointed the nameservers to dreamhost. So why would it just suddenly stop working?
I am a front-end web designer/developer, so keep that in mind in terms of how much you assume I already know. :) (Server-related stuff generally stumps me more than anything else).