Martyn Drake wrote:
[SNIP]
One thing to be aware of is to get the web hosting company to remove any references to the domain whose MX record(s) you change, from their mail servers, as this could lead to any messages that may get generated by your web site could still end up going to the old mail server (as the mail server will probably look at it's list of acceptable domains, say 'Aha! It's local, I'll deliver it to this local mailbox and not bother checking the MX records for this domain').
Another thing to bear in mind is that many servers, especially Windo$e servers, don't respect cache times at all. I have one client who is still receiving email at his old POP account with another ISP, some 9 weeks after we took over the DNS and changed the MX record.
You may want to keep the old one for a while and use fetchmail to pull it over.
Cheers, Laurie.